{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90800", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-13T15:07:31.018Z", "datePublished": "2026-10-20T15:40:47.497Z", "dateUpdated": "2026-10-20T18:10:09.013Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-10-20T15:40:47.497Z" }, "title": "Apache CouchDB: Auth bypass in prefixed _users and _replicator databases", "source": { "discovery": "UNKNOWN" }, "affected": [ { "vendor": "Apache Software Foundation", "product": "Apache CouchDB", "versions": [ { "status": "affected", "version": "0", "lessThan": "3.5.3", "versionType": "semver" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "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.", "lang": "en", "supportingMedia": [ { "type": "text/html", "base64": false, "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.

The use of prefixed system databases is very rare.

Users are recommended to upgrade to version 3.5.3, which fixes this issue.
" } ] } ], "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" } } ], "credits": [ { "lang": "en", "value": "Qing Xu & ZeroVuln Labs reported this issue independently", "type": "reporter" } ], "x_generator": { "engine": "Vulnogram 1.0.3" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-862", "lang": "en", "description": "CWE-862 Missing Authorization" } ] } ], "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" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "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": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-20T18:10:09.013Z" } } ] } }