Diffusers: TOCTOU Trust Remote Code Bypass

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Summary

CVECVE-2026-45804
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-15 17:16:48 UTC
Updated2026-07-15 20:52:04 UTC
DescriptionDiffusers 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.002680000 probability, percentile 0.185270000 (date 2026-07-16)

Problem Types: CWE-367 | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Huggingface Diffusers affected < 0.38.0 Not specified

References

ReferenceSourceLinkTags
github.com/huggingface/diffusers/releases/tag/v0.38.0 [email protected] github.com
github.com/huggingface/diffusers/pull/13448 [email protected] github.com
github.com/huggingface/diffusers/security/advisories/GHSA-7wx4-6vff-v64p 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/huggingface/diffusers/issues/13446 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/huggingface/diffusers/commit/a37f6f8394ac2a7ee8360c3abea811ef... [email protected] github.com
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