Medium severity5.9NVD Advisory· Published Sep 18, 2026· Updated Sep 23, 2026

CVE-2026-93750

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Kornelski/http-cache-semanticsllm-fuzzy
Range: <=4.2.0

Patches

Vulnerability mechanics

References

github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.jsnvd
github.com/kornelski/http-cache-semantics/issues/57nvd
www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-client-cache-disclosure-via-vary-wildcardnvd

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