CVE-2026-90800NVD

Vulnerability Summary

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.

Severity Level

HIGH(8.1)

Published Date

Oct 20, 2026

Last Modified

Oct 20, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

Data Pending

Root Weakness (CWE)

N/A

CVSS v4.0 Base Metrics — Score 8.1 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsPresent

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)None

Confidentiality (Subsequent System)High

Integrity (Subsequent System)High

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

Apache Software Foundation Apache CouchDB < 3.5.3

Patched Versions

Apache Software Foundation Apache CouchDB 3.5.3

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