What’s Vulnerable › Vulnerabilities

CVE-2026-45804: Diffusers: TOCTOU Trust Remote Code Bypass

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-367

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.

Affected products

• huggingface diffusers: before 0.38.0 — fixed in 0.38.0

How to fix

Upgrade to a fixed version: huggingface diffusers 0.38.0. Check the vendor advisory for mitigations.

References

• https://github.com/huggingface/diffusers/commit/a37f6f8394ac2a7ee8360c3abea811efe54512b1
• https://github.com/huggingface/diffusers/issues/13446
• https://github.com/huggingface/diffusers/pull/13448
• https://github.com/huggingface/diffusers/releases/tag/v0.38.0
• https://github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p
• https://github.com/huggingface/diffusers/issues/13446
• https://github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p

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