CVE-2026-93748: http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale
High · CVSS 7.5 (CVSS 3.1)EPSS 0.57%, 47th percentilePublished Updated Assigner: VulnCheck
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · CWE-524
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
kornelski: http-cache-semantics
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/kornelski/http-cache-semantics (opens in new tab)
- github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e9… (opens in new tab)
- github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e9… (opens in new tab)
- github.com/kornelski/http-cache-semantics/issues/56 (opens in new tab)
- www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclo… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)