# flash-attn (PyPI) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 2.8.3.post2 (Oct 14, 2026): no advisory affects it
- Newest unaffected release: 2.8.3.post2 (Oct 14, 2026), the latest release
- Weekly downloads: 70.6K
- Dependents: 62
- Releases: 77 since 0.2.0 (Nov 15, 2022)
- Registry: https://pypi.org/project/flash-attn/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-31253: 0.2.0 to 2.8.3 (2.8.3.post1 is outside it)

## Advisories (1)

### [CVE-2026-31253](https://cve.now/CVE-2026-31253): The flash-attention training framework thru commit e724e2588cbe754beb97cf7c011b5e7e34119e62 (2025-13-04) contains an insecure…

- Severity: High 7.3
- Published: May 11, 2026
- Affected: through 2.8.3.
- Fixed in 2.8.3.post1 (released Jun 11, 2026, 31 days after disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 2.8.3.post2, is not affected.

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