{"id":"CVE-2026-56671","title":"ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface","summary":"ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, get_model_preview in app/model_manager.py joins an unrestricted filename route capture to a selected model directory without a conta…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22"],"published":"2026-07-31","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:41:31.497","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56671","references":[{"url":"https://github.com/Comfy-Org/ComfyUI/pull/14734","label":"security-advisories@github.com"},{"url":"https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0","label":"security-advisories@github.com"},{"url":"https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-pj59-g5vv-74q4","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00661,"epssPercentile":0.5024,"ingestedAt":"2026-08-01T23:16:01.956Z","slug":"CVE-2026-56671","body":"## Overview\n\nComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, get_model_preview in app/model_manager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to use traversal, encoded traversal, absolute paths, or an unbounded path_index to read image-decodable files and enumerate host paths. get_model_preview (app/model_manager.py) built the path with os.path.join(folder, filename) where filename is an unrestricted {filename:.*} route capture. Literal ../, percent-encoded %2e%2e%2f, and absolute paths all escaped the model directory; path_index was also unbounded. The target file is piped through Pillow and re-encoded as WEBP, so disclosure is limited to image-decodable files plus a file-existence/enumeration oracle (and internal-path leakage via path_index errors). This issue is fixed in version 0.28.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}