CVE-2026-56671 ComfyUI: Path traversal in /experiment/models/preview allows arbitrary image file read
Unauthenticated attackers can read arbitrary image files and enumerate host paths via path traversal in the model preview endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56671?
CVE-2026-56671 is a high-severity path traversal vulnerability in Comfy-Org ComfyUI, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-56671?
How do I fix CVE-2026-56671?
No fix has been published for CVE-2026-56671 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-56671 being exploited?
There is no known exploitation of CVE-2026-56671 in the wild and no public exploit code.
Sources
Also known as GHSA-pj59-g5vv-74q4.