{"affected":[{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"http-cache-semantics","product":"http-cache-semantics","source":"CNA: VulnCheck","vendor":"kornelski","versions":[{"lessThanOrEqual":"4.2.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-93748","cwes":["CWE-524"],"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.","epss":{"date":"2026-11-05","percentile":0.4728,"score":0.00569},"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1793889644021,"publishedAt":1789753894262,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/kornelski/http-cache-semantics/issues/56"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/kornelski/http-cache-semantics"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale"},{"source":"ADP: CVE","tags":[],"url":"https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591"},{"source":"ADP: CVE","tags":[],"url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp"},{"source":"ADP: CVE","tags":[],"url":"https://github.com/github/advisory-database/issues/10139"},{"source":"OSV / GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp"},{"source":"OSV / GitHub Security Advisories","tags":["osv"],"url":"https://osv.dev/vulnerability/GHSA-ch52-4w7c-c8xp"}],"remediation":[],"revision":"6774b8293ddfb1ebef25bcf382666c059a871815a97c4b7c32e7c2882e78e463","sources":[{"modifiedAt":1793889644021,"name":"CNA: VulnCheck","retrievedAt":1793891507319,"url":"https://www.cve.org/CVERecord?id=CVE-2026-93748"},{"modifiedAt":1793223003919,"name":"OSV / GitHub Security Advisories","retrievedAt":1793891508829,"url":"https://osv.dev/vulnerability/GHSA-ch52-4w7c-c8xp"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793891508378,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93748"}],"ssvc":{"assessedAt":1792018593212,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale","updatedAt":1793891508829}