CVE-2026-45804

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.

Weakness classification

• CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Primary references

• security-advisories@github.com — Patch
• security-advisories@github.com — Issue Tracking, Exploit
• security-advisories@github.com — Issue Tracking
• security-advisories@github.com — Release Notes
• security-advisories@github.com — Vendor Advisory, Exploit
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Issue Tracking, Exploit
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Vendor Advisory, Exploit