# @casl/ability (npm) vulnerabilities

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

## At a glance

- Latest release: 7.1.1 (Oct 31, 2026): no advisory affects it
- Newest unaffected release: 7.1.1 (Oct 31, 2026), the latest release
- Weekly downloads: 2.6M
- Dependents: 31
- Releases: 99 since 2.0.1 (Mar 23, 2018)
- Registry: https://www.npmjs.com/package/@casl/ability
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-1774: 2.4.0 to 6.7.3 (6.7.5 is outside it)

## Advisories (1)

### [CVE-2026-1774](https://cve.now/CVE-2026-1774): CASL Ability, versions 2.4.0 through 6.7.4, contains a prototype pollution vulnerability.

- Severity: Critical 9.8
- Published: Feb 10, 2026
- Affected: from 2.4.0, fixed in 6.7.5.
- Fixed in 6.7.5 (released Dec 20, 2025, 52 days before disclosure).
- The latest release, 7.1.1, is not affected.
- 22% of @casl/ability downloads last week were affected versions (646.2K).

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