Deserialization of Untrusted Data in Apache CouchDB - CVE-2026-90799
Published: October 23, 2026
Vulnerability identifier: #VU157391
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90799
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service through memory exhaustion.
The vulnerability exists due to unsafe binary deserialization in the chttpd component of Apache CouchDB when processing _changes sequence values and _search bookmarks. A remote user can submit specially crafted sequence values to exhaust the atom table and cause a denial of service.
Affected software
Apache CouchDB
How to mitigate CVE-2026-90799
Install security update from vendor's website.
Apache CouchDB - update to 3.5.3