CVE-2026-56672

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{"affected": [{"affectedData": [{"product": "ComfyUI", "vendor": "Comfy-Org", "versions": [{"status": "affected", "version": "< 0.28.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "ComfyUI es una GUI, API y backend de modelo de difusi\u00f3n basado en nodos. Antes de la versi\u00f3n 0.28.0, GET /userdata/{file} serv\u00eda archivos HTML y SVG controlados por el usuario con tipos de contenido derivados de la extensi\u00f3n, permitiendo cross-site scripting almacenado en el origen de ComfyUI y acceso a tokens de API almacenados en el navegador, configuraciones, flujos de trabajo y llamadas a la API equivalentes a autenticadas. El gestor utilizaba web.FileResponse(path), por lo que un .html/.svg subido se serv\u00eda como text/html/image/svg+xml. POST /userdata almacena cuerpos de solicitud arbitrarios (confinados al directorio userdata del usuario). Cuando una v\u00edctima navegaba a la URL del archivo, el script incrustado se ejecutaba con el mismo origen. El endpoint /view ya forzaba la descarga de tipos MIME peligrosos; esa protecci\u00f3n nunca se hab\u00eda aplicado a /userdata. Este problema est\u00e1 solucionado en la versi\u00f3n 0.28.0."}], "id": "CVE-2026-56672", "lastModified": "2026-10-23T23:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56672", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-31T11:06:11.409441Z", "version": "2.0.3"}}]}, "published": "2026-07-31T06:16:30.170", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Comfy-Org/ComfyUI/commit/96e0e3585b41e1417442eaa14ec57f7b4ffcb5e0"}, {"source": "security-advisories@github.com", "url": "https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-53g8-45wq-pcv8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.28.0)"}}], "enrichment": {"confidence": 87.0, "confidence_source": "matching", "scores": [{"score": 87.0, "source": "matching"}]}, "original": {"product": "ComfyUI", "source": "cna", "vendor": "Comfy-Org"}, "product": "comfyui", "vendor": "comfy"}], "created": "2026-07-31T19:00:10.436905+00:00", "updated": "2026-08-02T19:30:17.795174+00:00", "vendors": ["comfy", "comfy$PRODUCT$comfyui"]}