Quick answers
- Is CVE-2026-56671 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-56671 being exploited in the wild.
- How severe is CVE-2026-56671?
- High severity, with a CVSS score of 7.5, published 31 July 2026.
- Which products and versions are affected?
- Comfy-Org ComfyUI < 0.28.0.
- Is there a fix for CVE-2026-56671?
- A patch was published on 2026-07-03: Fix merged into master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-56671 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-56671?
- Check whether you run Comfy-Org ComfyUI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A path traversal vulnerability exists in the `get_model_preview` function within `app/model_manager.py`. The application uses `os.path.join(folder, filename)` where `filename` is an unrestricted route capture (`{filename:.*}`) without a containment check. An unauthenticated remote attacker can use literal `../` sequences, percent-encoded traversal (`%2e%2e%2f`), or absolute paths to escape the intended model directory. While the disclosure is limited to files that can be decoded by the Pillow library (re-encoded as WEBP), the flaw also functions as a file-existence oracle and can leak internal paths via `path_index` errors. The issue is resolved in version 0.28.0 by implementing `realpath` and `os.path.commonpath` validation.
Affected products
- Comfy-Org ComfyUI < 0.28.0
Timeline
- 2026-07-03: patched: Fix merged into master branch
- 2026-07-15: advisory: GitHub Security Advisory published
- 2026-07-31: disclosed: CVE published to NVD