---
id: CVE-2026-90799
title: >-
  Apache CouchDB: Atom-table exhaustion in _changes sequences and _search
  bookmarks with specially crafted sequence values
summary: >-
  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 t…
severity: low
cvss: 1.3
cvssVector: >-
  CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/S:N/AU:Y/R:A/V:D/RE:M/U:Amber
cvssSource: cna
vendor: Apache Software Foundation
product: Apache CouchDB
affected:
  - apache_couchdb < 3.5.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T16:56:52.216221Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T18:10:08.069Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-90799'
references:
  - url: 'https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f'
  - url: 'https://lists.apache.org/thread/bqxkm19hw8985t7opz675b29hs1zl4z9'
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.308Z'
---

## Overview

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.

## Affected

- `apache_couchdb < 3.5.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.