{ "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-2026-33992", "tracking": { "current_release_date": "2026-03-31T15:25:23.810634Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33992", "initial_release_date": "2026-03-27T20:28:35.739902Z", "revision_history": [ { "date": "2026-03-27T20:28:35.739902Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-27T20:28:40.025875Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-28T07:40:21.657889Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-28T07:40:24.924085Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:40:41.879475Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-28T07:40:45.151129Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:43:08.118706Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-03-29T00:38:26.152478Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-29T00:38:27.984832Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-03-30T18:39:42.943178Z", "number": "10", "summary": "Unknown change." }, { "date": "2026-03-30T18:39:44.469980Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-30T20:47:09.593204Z", "number": "12", "summary": "References created (1)." }, { "date": "2026-03-31T15:25:16.420831Z", "number": "13", "summary": "CVSS created.| Products connected (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-03-31T15:25:19.164054Z", "number": "14", "summary": "NCSC Score updated." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/0.5.0", "product": { "name": "vers:unknown/0.5.0", "product_id": "CSAFPID-874488", "product_identification_helper": { "cpe": "cpe:2.3:a:pyload:pyload:0.5.0:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/<0.5.0b3.dev97", "product": { "name": "vers:unknown/<0.5.0b3.dev97", "product_id": "CSAFPID-5902863" } } ], "category": "product_name", "name": "pyload" } ], "category": "vendor", "name": "pyload" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33992", "cwe": { "id": "CWE-918", "name": "Server-Side Request Forgery (SSRF)" }, "notes": [ { "category": "description", "text": "## Summary\n\nPyLoad's download engine accepts arbitrary URLs without validation, enabling Server-Side Request Forgery (SSRF) attacks. An authenticated attacker can exploit this to access internal network services and exfiltrate cloud provider metadata. On DigitalOcean droplets, this exposes sensitive infrastructure data including droplet ID, network configuration, region, authentication keys, and SSH keys configured in user-data/cloud-init.\n\n## Details\n\nThe vulnerability exists in PyLoad's download package functionality (`/api/addPackage` endpoint), which directly passes user-supplied URLs to the download engine without validating the destination. The affected code in `src/pyload/webui/app/blueprints/api_blueprint.py`:\n\n```python\n@bp.route(\"/addPackage\", methods=[\"POST\"], endpoint=\"add_package\")\n@login_required\ndef add_package():\n name = flask.request.form[\"add_name\"]\n links = flask.request.form[\"add_links\"].split(\"\\n\")\n # ... validation omitted ...\n api.add_package(name, links, dest) # No URL validation\n```\n\nThe download engine in `src/pyload/core/managers/download.py` accepts any URL scheme and initiates HTTP requests to arbitrary destinations, including internal network addresses and cloud metadata endpoints.\n\n## Proof of Concept\n\n**Live Demo Instance:** http://143.244.141.81:8000 \n**Credentials:** `pyload` / `pyload`\n\n- Login into the pyload application\n- Navigate to package tab and enter the package name and fill the Link section with the following URL\n\n```\nhttp://169.254.169.254/metadata/v1.json\n```\n\n\"image\"\n\n- Now navigate to Files section and download the link.\n\n\"image\"\n\n- It was observed that we are able to Read the Digital Ocean Metadata\n\n\"image\"\n\nThe downloaded `v1.json` file contains sensitive cloud infrastructure data:\n- **Droplet ID**: Unique identifier for the instance\n- **Network Configuration**: Public/private IP addresses, VPC topology\n- **Authentication Keys**: Cloud provider auth tokens\n- **SSH Keys**: Public keys configured in droplet metadata\n- **Region and Datacenter**: Infrastructure location\n\n## Impact\n\n**Vulnerability Type:** Server-Side Request Forgery (SSRF) \n**CVSS Score:** 7.7 - 9.1 (High to Critical, depending on cloud deployment)\n\n### Affected Systems\n- All PyLoad installations (version 0.5.0 and potentially earlier)\n- **Critical Impact** on cloud deployments (AWS EC2, DigitalOcean, Google Cloud, Azure) where metadata contains:\n - IAM credentials (AWS)\n - SSH private keys (configured in user-data)\n - API tokens and secrets\n - Database credentials stored in cloud-init\n\n### Attack Requirements\n- Valid PyLoad user account (any role - ADMIN or USER)\n- Network connectivity to PyLoad instance\n\n### Security Impact\n1. **Cloud Metadata Theft**: Complete exfiltration of instance metadata\n2. **Lateral Movement**: Discovery and enumeration of internal network services\n3. **Credential Exposure**: Theft of cloud IAM credentials, SSH keys, API tokens\n4. **Infrastructure Mapping**: Network topology, IP addressing, service discovery\n\n## Remediation\n\nImplement URL validation in the download engine:\n1. Whitelist allowed URL schemes (http/https only)\n2. Block requests to private IP ranges (RFC 1918, link-local addresses)\n3. Block cloud metadata endpoints (169.254.169.254, metadata.google.internal, etc.)\n4. Implement request destination validation before initiating downloads", "title": "github - https://api.github.com/advisories/GHSA-m74m-f7cr-432x" }, { "category": "description", "text": "pyLoad is a free and open-source download manager written in Python. Prior to version 0.5.0b3.dev97, PyLoad's download engine accepts arbitrary URLs without validation, enabling Server-Side Request Forgery (SSRF) attacks. An authenticated attacker can exploit this to access internal network services and exfiltrate cloud provider metadata. On DigitalOcean droplets, this exposes sensitive infrastructure data including droplet ID, network configuration, region, authentication keys, and SSH keys configured in user-data/cloud-init. Version 0.5.0b3.dev97 contains a patch.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33992.json" }, { "category": "description", "text": "pyLoad is a free and open-source download manager written in Python. Prior to version 0.5.0b3.dev97, PyLoad's download engine accepts arbitrary URLs without validation, enabling Server-Side Request Forgery (SSRF) attacks. An authenticated attacker can exploit this to access internal network services and exfiltrate cloud provider metadata. On DigitalOcean droplets, this exposes sensitive infrastructure data including droplet ID, network configuration, region, authentication keys, and SSH keys configured in user-data/cloud-init. Version 0.5.0b3.dev97 contains a patch.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33992" }, { "category": "other", "text": "0.00082", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "9.3", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.5", "title": "NCSC Score" }, { "category": "other", "text": "There is exploit data available from source Nvd, Is related to (a version of) an uncommon product, The value of the most recent EPSS score", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5902863", "CSAFPID-874488" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-m74m-f7cr-432x" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33992.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33992" }, { "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/pyload/pyload/security/advisories/GHSA-m74m-f7cr-432x" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/pyload/pyload/commit/b76b6d4ee5e32d2118d26afdee1d0a9e57d4bfe8" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-m74m-f7cr-432x" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33992" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5902863", "CSAFPID-874488" ] } ], "title": "CVE-2026-33992" } ] }