{"id":"EUVD-2026-83253","revision":"ed8c6e1b58a04aefa023e3f4b055402a","records":[{"revision":"ed8c6e1b58a04aefa023e3f4b055402a","observedAt":"2026-10-30T12:54:28.896+00:00","statement":{"source":"euvd","id":"EUVD-2026-83253","aliases":["CVE-2026-93748","GHSA-ch52-4w7c-c8xp"],"title":"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…","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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","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","score":8.7,"severity":null}],"references":["https://github.com/kornelski/http-cache-semantics/issues/56","https://github.com/kornelski/http-cache-semantics","https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441","https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623","https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83253","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 18, 2026, 5:51:34 PM","dateUpdated":"Oct 14, 2026, 10:56:47 PM"},"relatedAdvisories":[{"id":"RHSA-2026:88198","title":"Red Hat Security Advisory: Red Hat Developer Hub 1.10.6 release.","vulnerabilityIds":["CVE-2026-84782","CVE-2026-90711","CVE-2026-93748","CVE-2026-93749","CVE-2026-101916"]},{"id":"msrc_CVE-2026-93748","title":"http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale","vulnerabilityIds":["CVE-2026-93748"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-83253","identifiers":["EUVD-2026-83253","CVE-2026-93748","GHSA-ch52-4w7c-c8xp"]},"retained":false,"historicalAffected":[]}],"coverage":[]}