Time-of-check Time-of-use (TOCTOU) Race Condition Affecting diffusers package, versions [,0.38.0)
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published21 May 2026
- disclosed20 May 2026
- creditgal-zafran
Introduced: 20 May 2026
CVE-2026-45804 (opens in a new tab)How to fix?
Upgrade diffusers to version 0.38.0 or higher.
Overview
diffusers is a State-of-the-art diffusion in PyTorch and JAX.
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition in the from_pretrained flow. An attacker can execute arbitrary code by exploiting a race condition between two repository fetch operations, allowing them to introduce malicious files after an initial trust check but before the final import occurs.