CVE-2026-93750 [MEDIUM] – http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyM

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.