CVE-2026-93748
highhttp-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticat…
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/kornelski/http-cache-semantics disclosure@vulncheck.com
- https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980... disclosure@vulncheck.com
- https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980... disclosure@vulncheck.com
- https://github.com/kornelski/http-cache-semantics/issues/56 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-d... disclosure@vulncheck.com
- https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591 af854a3a-2127-422b-91ae-364da2661108