{"id":"CVE-2026-93750","published":"2026-09-18T18:18:33.633","lastModified":"2026-09-23T17:17:49.997","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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-436"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kornelski/http-cache-semantics","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L483-L501","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/issues/57","tags":[]},{"url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-client-cache-disclosure-via-vary-wildcard","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/issues/57","tags":[]}],"exploitRefs":[{"url":"https://github.com/kornelski/http-cache-semantics","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L483-L501","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/issues/57","tags":[]},{"url":"https://github.com/kornelski/http-cache-semantics/issues/57","tags":[]}],"hasPoc":true,"ai":null}