CVE-2026-56672
- Source
- https://cve.org/CVERecord?id=CVE-2026-56672
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56672.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-56672
- Aliases
-
- GHSA-53g8-45wq-pcv8
- Published
- 2026-07-31T04:27:18.721Z
- Modified
- 2026-08-04T11:49:15.867929834Z
- Severity
-
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N CVSS Calculator
- Summary
- ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization
- Details
-
ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/{file} served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflows, and authenticated-equivalent API calls. The handler used web.FileResponse(path), so an uploaded .html/.svg was served as text/html/image/svg+xml. POST /userdata stores arbitrary request bodies (confined to the user's userdata directory). When a victim navigated to the file URL, the embedded script executed same-origin. The /view endpoint already forced dangerous MIME types to download; that protection had never been applied to /userdata. This issue is fixed in version 0.28.0.
- Database specific
{ "cwe_ids": [ "CWE-79" ], "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56672.json" }- References
-
- https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56672.json
- https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-53g8-45wq-pcv8
- https://nvd.nist.gov/vuln/detail/CVE-2026-56672
- https://github.com/Comfy-Org/ComfyUI/commit/96e0e3585b41e1417442eaa14ec57f7b4ffcb5e0