{"schema":"threatline.record/2","record":{"id":"CVE-2026-93748","aliases":["GHSA-ch52-4w7c-c8xp"],"summary":"http-cache-semantics max-stale handling can disclose cross-user cached responses","details":"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.","categories":["Libraries & packages"],"product":"http-cache-semantics","vendor":"kornelski","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp","source_modified_at":"2026-10-02T22:36:44Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"http-cache-semantics"},"range":"<= 4.2.0"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93748","source_modified_at":"2026-10-14T22:56:47.595Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"http-cache-semantics","vendor":"kornelski","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"4.2.0"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-ch52-4w7c-c8xp","source_modified_at":"2026-10-02T22:45:04.334960361Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"http-cache-semantics","ecosystem":"npm","purl":"pkg:npm/http-cache-semantics"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"4.2.0"}]}],"versions":[]}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00569,"percentile":0.46424,"score_date":"2026-10-23"},"published_at":"2026-09-18T17:51:34.262Z","modified_at":"2026-10-14T22:56:47.595Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-02T22:36:44Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93748","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-14T22:56:47.595Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-ch52-4w7c-c8xp","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-02T22:45:04.334960361Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93748","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93748","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/kornelski/http-cache-semantics/issues/56","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623","tags":["technical-description"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale","tags":["third-party-advisory"]},{"url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/kornelski/http-cache-semantics","tags":["product"]},{"source":"CVE List","url":"https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-14T22:56:33.212079Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-14T22:56:47.595Z","content_hash":"2ce4707f2c3c9bdca4d88098673845f39add93e46dc178e601f3b4028c878f3f"}}