Missing Authorization in Apache CouchDB - CVE-2026-90800
Published: October 23, 2026
Vulnerability identifier: #VU157392
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90800
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read the full contents of prefixed system databases in Apache CouchDB without authorization.
The vulnerability exists due to missing authorization checks in chttpd when handling requests to an API endpoint for prefixed _users or _replicator databases. A remote attacker can send a request to the endpoint to read the full contents of these databases without authorization.
Affected software
Apache CouchDB
How to mitigate CVE-2026-90800
Install security update from vendor's website.
Apache CouchDB - update to 3.5.3