HIGH 8.2 NVD
CVE-2026-93750
http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyMatches() function that fails to properly validate Vary header wildcard
http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyMatches() function that fails to properly validate Vary header wildcards due to byte-for-byte string comparison. Attackers can request URLs previously fetched by other clients to receive cached responses intended for different users, disclosing sensitive information across clients.
References
- https://github.com/kornelski/http-cache-semantics
- https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980
- https://github.com/kornelski/http-cache-semantics/issues/57
- https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-client-cache
- https://github.com/kornelski/http-cache-semantics/issues/57
This high severity vulnerability with a CVSS score of 8.2 was published on 2026-09-18 via NVD.
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