Improper handling of highly compressed data in Apache CouchDB - CVE-2026-90797
Published: October 23, 2026
Vulnerability identifier: #VU157389
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90797
CWE-ID: CWE-409
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service through memory exhaustion.
The vulnerability exists due to unlimited gzip decompression in the Apache CouchDB chttpd component when processing gzip-compressed POST requests to /_session. A remote attacker can send a gzip decompression bomb to exhaust server memory and cause a denial of service.
Affected software
Apache CouchDB
How to mitigate CVE-2026-90797
Install security update from vendor's website.
Apache CouchDB - update to 3.5.3