{"id":"CVE-2026-90800","aliases":["BIT-couchdb-2026-90800","EUVD-2026-105100","GHSA-49pc-3x56-3wp6","UBUNTU-CVE-2026-90800"],"status":"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.","severity":{"version":"4.0","score":8.1,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00633,"percentile":0.50674,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-862"],"published":"2026-10-20T15:40:47Z","modified":"2026-10-29T10:45:05Z","fixes":[{"ecosystem":"Bitnami","package":"couchdb","fixed_in":["3.5.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"couchdb","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.5.3"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"couchdb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-0ubuntu7"]}],"products":[{"vendor":"apache software foundation","product":"apache couchdb"}],"references":[{"url":"https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f","tags":["release-notes","web"]},{"url":"https://lists.apache.org/thread/vng8vqjwgy1qlrv14wzrgs7pv4gj7gwr","tags":["vendor-advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/20/15","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90800","tags":["web"]},{"url":"https://github.com/advisories/GHSA-49pc-3x56-3wp6"},{"url":"https://ubuntu.com/security/CVE-2026-90800","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90800","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-90800","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.","status":"published","published":"2026-10-20T15:40:47.497Z","modified":"2026-10-20T18:10:09.013Z","cvss":[{"version":"4.0","score":8.1,"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","level":"high","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T13:45:47.885058Z"}],"euvd":[{"id":"EUVD-2026-105100","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.","status":"published","published":"2026-10-20T15:40:47Z","modified":"2026-10-20T18:10:09Z","cvss":[{"version":"4.0","score":8.1,"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","level":"high"}],"updated_at":"2026-11-02T16:59:43.145678Z"}],"ghsa":[{"id":"GHSA-49pc-3x56-3wp6","title":"Missing authorisation checks in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows...","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.","status":"published","published":"2026-10-20T18:31:46Z","modified":"2026-10-20T21:31:01Z","cvss":[{"version":"4.0","score":8.1,"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/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:N/AU:Y/R:U/V:C/RE:M/U:Amber","level":"high"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:14:04.750771Z"}],"nvd":[{"id":"CVE-2026-90800","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.","status":"published","published":"2026-10-20T16:17:16.033Z","modified":"2026-10-20T19:34:00.7Z","cvss":[{"version":"4.0","score":8.1,"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/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:N/AU:Y/R:U/V:C/RE:M/U:Amber","level":"high","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:13:01.161484Z"}],"osv":[{"id":"UBUNTU-CVE-2026-90800","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. The use of prefixed system databases is very rare. Users are recommended to upgrade to version 3.5.3, which fixes this issue.","status":"published","published":"2026-10-20T16:17:00Z","modified":"2026-10-28T20:17:36.207563578Z","cvss":[{"version":"4.0","score":8.1,"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","level":"high"}],"updated_at":"2026-11-02T16:57:40.980117Z"},{"id":"BIT-couchdb-2026-90800","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.","status":"published","published":"2026-10-29T08:39:50.639Z","modified":"2026-10-29T10:45:05.844230947Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}