{"id":"CVE-2026-90800","state":"PUBLISHED","title":"Apache CouchDB: Auth bypass in prefixed _users and _replicator databases","description":"Missing authorisation checks in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any request to read the full contents of a prefixed _user or _replicator database via an unauthorised API endpoint.\n\n\nThe use of prefixed system databases is very rare.\n\nUsers are recommended to upgrade to version 3.5.3, which fixes this issue.","publishedAt":"2026-10-20T15:40:47.497Z","updatedAt":"2026-10-20T18:10:09.013Z","severity":{"score":8.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:N/AU:Y/R:U/V:C/RE:M/U:Amber","source":"apache"},"assigner":"apache","products":["Apache Software Foundation Apache CouchDB"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache CouchDB","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.5.3","versionType":"semver"}]}],"references":["https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f","https://lists.apache.org/thread/vng8vqjwgy1qlrv14wzrgs7pv4gj7gwr","http://www.openwall.com/lists/oss-security/2026/10/20/15"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90800.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90800","state":"PUBLISHED","datePublished":"2026-10-20T15:40:47.497Z","dateUpdated":"2026-10-20T18:10:09.013Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-09-13T15:07:31.018Z"},"containers":{"cna":{"title":"Apache CouchDB: Auth bypass in prefixed _users and _replicator databases","descriptions":[{"lang":"en","value":"Missing authorisation checks in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any request to read the full contents of a prefixed _user or _replicator database via an unauthorised API endpoint.\n\n\nThe use of prefixed system databases is very rare.\n\nUsers are recommended to upgrade to version 3.5.3, which fixes this issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache CouchDB","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.5.3","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f","tags":["release-notes"]},{"url":"https://lists.apache.org/thread/vng8vqjwgy1qlrv14wzrgs7pv4gj7gwr","tags":["vendor-advisory"]}],"metrics":[{"scenarios":[{"lang":"en","value":"GENERAL"}],"format":"CVSS","cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","Safety":"NEGLIGIBLE","Automatable":"YES","Recovery":"USER","valueDensity":"CONCENTRATED","vulnerabilityResponseEffort":"MODERATE","providerUrgency":"AMBER","version":"4.0","baseSeverity":"HIGH","baseScore":8.1,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:N/AU:Y/R:U/V:C/RE:M/U:Amber"}}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-10-20T15:40:47.497Z"},"source":{"discovery":"UNKNOWN"},"credits":[{"lang":"en","value":"Qing Xu & ZeroVuln Labs reported this issue independently","type":"reporter"}],"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T16:57:29.708316Z","id":"CVE-2026-90800","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","type":"CWE","lang":"en","description":"CWE-862 Missing Authorization"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T16:57:49.711Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/10/20/15"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-10-20T18:10:09.013Z"}}]}}}