# http-cache-semantics (npm) vulnerabilities

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

## At a glance

- Latest release: 4.3.0 (Oct 4, 2026): no advisory affects it
- Newest unaffected release: 4.3.0 (Oct 4, 2026), the latest release
- Weekly downloads: 71.6M
- Dependents: 95.1K
- Releases: 30 since 1.0.0 (May 31, 2016)
- Registry: https://www.npmjs.com/package/http-cache-semantics
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-93748: 1.0.0 to 4.2.0 (4.3.0 is outside it)
- CVE-2022-25881: 1.0.0 to 4.1.0 (4.1.1 is outside it)

## Advisories (2)

### [CVE-2026-93748](https://cve.now/CVE-2026-93748): http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale

- Severity: High 8.7
- Published: Sep 18, 2026
- Affected: through 4.2.0.
- Fixed in 4.3.0 (released Oct 4, 2026, 16 days after disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 4.3.0, is not affected.
- 67% of http-cache-semantics downloads last week were affected versions (53.9M).

### [CVE-2022-25881](https://cve.now/CVE-2022-25881): This affects versions of the package http-cache-semantics before 4.1.1.

- Severity: Medium 5.3
- Published: Jan 31, 2023
- Affected: fixed in 4.1.1.
- Fixed in 4.1.1 (released Jan 27, 2023, 4 days before disclosure).
- The latest release, 4.3.0, is not affected.
- 6% of http-cache-semantics downloads last week were affected versions (4.8M).

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