Apache CouchDB 3.5.2-3.5.2 Missing Auth Checks in chttpd API
CVE-2026-90800 Published on October 20, 2026

Apache CouchDB: Auth bypass in prefixed _users and _replicator databases
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 Advisory NVD

Vulnerability Analysis

CVE-2026-90800 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE

Products Associated with CVE-2026-90800

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Apache Couchdb
 

Affected Versions

Apache Software Foundation Apache CouchDB: