Path Traversal in Huggingface Diffusers
CVE-2026-65920
Diffusers through 0.39.0, fixed in commit cee298c, contains a path traversal vulnerability in the _get_checkpoint_shard_files function that allows attackers to read arbitrary files by supplying malicious weight_map values in model index JSON. Attackers can use ../ sequences or absolute paths in weight_map entries to escape the model directory and read safetensors files outside the intended location during model loading.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Huggingface Diffusers — versions 0, cee298c1f37c439a9a408396b8283a921238a1c6
Weakness classification (CWE)
References
- github.com/huggingface/diffusers/issues/14175 (issue-tracking, technical-description, exploit)
- github.com/huggingface/diffusers/pull/14182 (issue-tracking, patch)
- github.com/huggingface/diffusers/commit/cee298c1f37c439a9a408396b8283a921238a1c6 (patch)
- www.vulncheck.com/advisories/diffusers-path-traversal-via-weight-map-arbitrary-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-65920?
- CVE-2026-65920 is a medium-severity vulnerability in Huggingface Diffusers, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-07-23.
- How severe is CVE-2026-65920?
- Medium severity. CVSS v3 base score is 4.3 out of 10.