Vulnerability in Huggingface Diffusers
CVE-2026-45804
Diffusers is the a library for pretrained diffusion models. Prior to 0.38.0, Diffusers' DiffusionPipeline.from_pretrained flow can bypass the trust_remote_code guard because download() validates model_index.json and custom pipeline code before later loading from a cached folder that can change, allowing a Hub repository with custom .py pipeline code to execute through the custom pipeline flow without passing custom_pipeline or trust_remote_code=True. This issue is fixed in version 0.38.0.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.6% 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 < 0.38.0
Weakness classification (CWE)
References
- github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p (Exploit, Vendor Advisory)
- github.com/huggingface/diffusers/issues/13446 (Exploit, Issue Tracking)
- github.com/huggingface/diffusers/pull/13448 (Issue Tracking)
- github.com/huggingface/diffusers/commit/a37f6f8394ac2a7ee8360c3abea811efe54512b1 (Patch)
- github.com/huggingface/diffusers/releases/tag/v0.38.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-45804?
- CVE-2026-45804 is a high-severity vulnerability in Huggingface Diffusers, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2026-07-15.
- How severe is CVE-2026-45804?
- High severity. CVSS v3 base score is 7.5 out of 10.