# browserslist (npm) vulnerabilities

3 known vulnerabilities (2 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 4.29.5 (Oct 26, 2026): no advisory affects it
- Newest unaffected release: 4.29.5 (Oct 26, 2026), the latest release
- Weekly downloads: 260.4M
- Dependents: 191.7K
- Releases: 223 since 0.1.0 (Dec 15, 2014)
- Registry: https://www.npmjs.com/package/browserslist
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-73089: 0.1.0 to 4.28.6 (4.28.7 is outside it)
- CVE-2026-73088: 0.1.0 to 4.28.6 (4.28.7 is outside it)
- CVE-2021-23364: 4.0.0 to 4.16.4 (4.16.5 is outside it)

## Advisories (3)

### [CVE-2026-73089](https://cve.now/CVE-2026-73089): Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM

- Severity: High 7.5
- Published: Aug 11, 2026
- Affected: fixed in 4.28.7.
- Fixed in 4.28.7 (released Jul 21, 2026, 21 days before disclosure).
- The latest release, 4.29.5, is not affected.
- 45% of browserslist downloads last week were affected versions (130.6M).

### [CVE-2026-73088](https://cve.now/CVE-2026-73088): Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)

- Severity: High 7.5
- Published: Aug 11, 2026
- Affected: fixed in 4.28.7.
- Fixed in 4.28.7 (released Jul 21, 2026, 21 days before disclosure).
- The latest release, 4.29.5, is not affected.
- 45% of browserslist downloads last week were affected versions (130.6M).

### [CVE-2021-23364](https://cve.now/CVE-2021-23364): Regular Expression Denial of Service (ReDoS)

- Severity: Medium 5.3
- Published: Apr 28, 2021
- Affected: from 4.0.0, fixed in 4.16.5.
- Fixed in 4.16.5 (released Apr 22, 2021, 6 days before disclosure).
- The latest release, 4.29.5, is not affected.
- 1.1% of browserslist downloads last week were affected versions (3.3M).

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