kornelski/http-cache-semantics · Security
http-cache-semantics max-stale handling can disclose cross-user cached responses
- GHSA ID
- GHSA-ch52-4w7c-c8xp
- CVE ID
- CVE-2026-93748
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Description
http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.
CWEs
- CWE-524 · Use of Cache Containing Sensitive Information
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-93748 ↗
- https://github.com/kornelski/http-cache-semantics/issues/56 ↗
- https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441 ↗
- https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623 ↗
- https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale ↗
- https://github.com/advisories/GHSA-ch52-4w7c-c8xp ↗