CVE-2026-90800
High
Description
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.
SeverityHigh
CVSS8.1
Exploit probability—
ProductApache CouchDB
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- Apache Software Foundation Apache CouchDB3.5.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Software Foundation Apache CouchDB | v < 3.5.3 | 3.5.3 |
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