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Vulnerability record · CVE-2026-45804 · published 15 July 2026

CVE-2026-45804: Huggingface diffusers toctou race condition vulnerability

Huggingface · Diffusers

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.

7.5 CVSS 3.1 High EPSS 0.37% · top 71.7% CWE-367 · TOCTOU race condition
7.5CVSS 3.1 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References, 4 tagged exploit
12 Aug 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/huggingface/diffusers/commit/a37f6f8394ac2a7ee8360c3abea811efe54512b1 Patch
https://github.com/huggingface/diffusers/issues/13446 Issue TrackingExploit
https://github.com/huggingface/diffusers/pull/13448 Issue Tracking
https://github.com/huggingface/diffusers/releases/tag/v0.38.0 Release Notes
https://github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p Vendor AdvisoryExploit
https://github.com/huggingface/diffusers/issues/13446 Issue TrackingExploit
https://github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p Vendor AdvisoryExploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-45804), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.