CVE-2026-90797
Apache CouchDB: Pre-authentication gzip decompression bomb via POST /_session
Apache Software Foundation Apache CouchDBDatabases
CVSS
7.7HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.67%Chance of exploitation activity in the next 30 days, higher than 51% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 3.5.3Apache CouchDBCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
An unlimited gzip decompression routine in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any remote client to cause a denial of service via memory exhaustion. Users are recommended to upgrade to version 3.5.3, which fixes this issue.
Text from CVE List
Affected versions 1
- Apache CouchDBaffected: all versions before 3.5.3CVE List