{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-56672 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-56672 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-56672 is a high-severity cross-site scripting vulnerability in Comfy-Org ComfyUI, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-56672 and fix it if it is affected.\n\nWhat it is: CVE-2026-56672 is a high-severity cross-site scripting vulnerability in Comfy-Org ComfyUI, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-56672 in the wild and no public exploit code.\n\nAffected product: Comfy-Org ComfyUI. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-56672/ (Markdown: https://insights.sbomify.com/CVE-2026-56672/index.md)","id":"CVE-2026-56672","markdown":"https://insights.sbomify.com/CVE-2026-56672/index.md","name":"CVE-2026-56672","record":{"aliases":["GHSA-53g8-45wq-pcv8"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"ComfyUI diffusion GUI","requires_auth":"none","summary":"Attackers can execute arbitrary scripts in the ComfyUI origin by uploading malicious HTML or SVG files, potentially stealing API tokens and workflows.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization","id":"CVE-2026-56672","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"ComfyUI: Path traversal in LoadImage via the /prompt API allows arbitrary file existence probing and image exfiltration","id":"CVE-2026-56673"},"packages":[],"prev":{"headline":"ComfyUI: Path traversal in /experiment/models/preview allows arbitrary image file read","id":"CVE-2026-56671"},"products":["ComfyUI"],"published":"2026-07-31","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-31","vendors":["Comfy-Org"]},"summary":"Attackers can execute arbitrary scripts in the ComfyUI origin by uploading malicious HTML or SVG files, potentially stealing API tokens and workflows.","url":"https://insights.sbomify.com/CVE-2026-56672/"}