Apache CouchDB 3.5.2 Unsafe Binary Deserialization Denial of Service
CVE-2026-90799 Published on October 20, 2026
Apache CouchDB: Atom-table exhaustion in _changes sequences and _search bookmarks with specially crafted sequence values
Unsafe binary deserialisation in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows an authenticated user to cause a denial of service via memory exhaustion.
Users are recommended to upgrade to version 3.5.3, which fixes this issue.
Vulnerability Analysis
CVE-2026-90799 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-90799 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-90799
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Affected Versions
Apache Software Foundation Apache CouchDB:- Before 3.5.3 is affected.