{"id":"GHSA-ch52-4w7c-c8xp","aliases":["CVE-2026-93748"],"cve":{"records":[{"id":"CVE-2026-93748","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-18T16:30:17.085Z","published":"2026-09-18T17:51:34.262Z","modified":"2026-11-05T14:40:44.021Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-09-24T14:23:07.274Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-14T22:56:47.595Z"},{"name":"CVE","role":"ADP","organizationId":"af854a3a-2127-422b-91ae-364da2661108","modified":"2026-11-05T14:40:44.021Z"}],"references":[{"url":"https://github.com/kornelski/http-cache-semantics/issues/56","tags":["issue-tracking"],"source":"VulnCheck"},{"url":"https://github.com/kornelski/http-cache-semantics","tags":["product"],"source":"VulnCheck"},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591","tags":[],"source":"CVE"},{"url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp","tags":[],"source":"CVE"},{"url":"https://github.com/github/advisory-database/issues/10139","tags":[],"source":"CVE"}],"weaknesses":[{"id":"CWE-524","description":"Use of Cache Containing Sensitive Information","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:http-cache-semantics_project:http-cache-semantics:*:*:*:*:*:*:*:*","versionEndIncluding":"4.2.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-14T22:56:33.212079Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale","titleSource":"VulnCheck","descriptionSource":"VulnCheck","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.","score":8.7,"severity":"high","published":"2026-09-18T17:51:34.262Z","modified":"2026-11-05T14:40:44.021Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"kornelski","name":"http-cache-semantics","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.2.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:npm/http-cache-semantics","packageIdentity":{"ecosystem":"npm","name":"http-cache-semantics"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-93748"}],"remediation":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-93748","https://github.com/kornelski/http-cache-semantics/issues/56","https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591","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","https://github.com/advisories/GHSA-ch52-4w7c-c8xp","https://github.com/github/advisory-database/issues/10139"],"sources":[{"name":"OSV","id":"GHSA-ch52-4w7c-c8xp","modified":"2026-10-28T21:30:03.919123103Z","url":"https://osv.dev/vulnerability/GHSA-ch52-4w7c-c8xp"},{"name":"CVE","id":"CVE-2026-93748","modified":"2026-11-05T14:40:44.021Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-93748"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},{"source":"OSV","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},{"source":"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","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5}],"sourceAffected":[],"observedAt":"2026-11-05T16:17:56.839Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:55:35.117Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-28T23:10:32.777Z","attemptedAt":"2026-10-28T23:10:32.777Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-28T23:10:33.356Z","attemptedAt":"2026-10-28T23:10:33.356Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-28T23:10:32.951Z","attemptedAt":"2026-10-28T23:10:32.951Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-28T23:10:33.177Z","attemptedAt":"2026-10-28T23:10:33.177Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-93748","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93748","modified":"2026-10-14T23:19:08.810","score":8.7,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-28T23:10:32.777Z"},{"source":"NVD","id":"CVE-2026-93748","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93748","modified":"2026-10-14T23:19:08.810","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-28T23:10:32.777Z"},{"source":"ENISA EUVD","id":"EUVD-2026-83253","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83253","modified":"Oct 14, 2026, 10:56:47 PM","score":8.7,"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","checkedAt":"2026-10-28T23:10:32.951Z"},{"source":"FIRST EPSS","id":"CVE-2026-93748","url":"https://www.first.org/epss/","probability":0.00569,"percentile":0.47012,"date":"2026-10-28","checkedAt":"2026-10-28T23:10:33.177Z"},{"source":"GitHub Advisory Database","id":"GHSA-ch52-4w7c-c8xp","url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp","modified":"2026-10-28T21:13:40Z","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","checkedAt":"2026-10-28T23:10:33.356Z"}],"aiSummary":null}