# brotlicffi (PyPI) vulnerabilities

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

## At a glance

- Latest release: 1.2.1.0 (Oct 22, 2026): no advisory affects it
- Newest unaffected release: 1.2.1.0 (Oct 22, 2026), the latest release
- Weekly downloads: 464.1K
- Dependents: 87
- Releases: 9 since 0.8.0 (Nov 30, 2020)
- Registry: https://pypi.org/project/brotlicffi/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-111497: 0.8.0 to 1.2.0.2 (1.2.1.0 is outside it)

## Advisories (1)

### [CVE-2026-111497](https://cve.now/CVE-2026-111497): Out-of-Bounds Write in Google Brotli Decoder

- Severity: Critical 9.2 · KEV
- Published: Oct 22, 2026
- Affected: fixed in 1.2.1.0; from 1.0.3, fixed in 1.2.1.0.
- Fixed in 1.2.1.0 (released Oct 22, 2026, the day of disclosure).
- The latest release, 1.2.1.0, is not affected.

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