CVE-2026-90797

Apache CouchDB: Pre-authentication gzip decompression bomb via POST /_session

Published Oct 20, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Apache
Apache couchdb
Vendors & Products Apache
Apache couchdb
Type Values Removed Values Added
Weaknesses CWE-409
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Apache CouchDB: Pre-authentication gzip decompression bomb via POST /_session
References
Metrics cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/S:N/AU:Y/R:A/V:D/RE:M/U:Red'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Oct 20, 2026, 6:10 PM
Reserved
Sep 13, 2026, 3:01 PM
Status
Deferred
Published
Oct 20, 2026, 4:17 PM
Modified
Oct 20, 2026, 7:34 PM