Vulnerability · Published Jul 31, 2026 · Assigned by GitHub_M

CVE-2026-56671ComfyUI: Path traversal in /experiment/models/preview allows arbitrary image file read

High 7.5

In plain English

A high-severity path traversal in ComfyUI from Comfy-Org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)1.0%top 37.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 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.

Affected products (as reported)

Vendor	Product	Versions
Comfy-Org	ComfyUI	< 0.28.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-pj59-g5vv-74q4 x_refsource_CONFIRM
https://github.com/Comfy-Org/ComfyUI/pull/14734 x_refsource_MISC
https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0 x_refsource_MISC