CVE-2026-90800

UNKNOWN 0.0

Apache CouchDB: Auth bypass in prefixed _users and _replicator databases

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	apache software foundation
Product	apache couchdb
Published	Oct 20, 2026

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Affected Versions

Apache Software Foundation / Apache CouchDB

0 < 3.5.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

lists.apache.org: https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f lists.apache.org: https://lists.apache.org/thread/vng8vqjwgy1qlrv14wzrgs7pv4gj7gwr

Credits

🔍 Qing Xu & ZeroVuln Labs reported this issue independently