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Message-Id: <1D695562-D480-4771-B3A6-145FBE5BB2D3@apache.org>
Date: Tue, 20 Oct 2026 14:28:03 +0200
From: Jan Lehnardt <jan@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-90797: Apache CouchDB: Pre-authentication gzip decompression
bomb via POST /_session
Severity:
CVSS 4.0: 7.7 (high) 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
Affected versions:
- Apache CouchDB before 3.5.3
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.
Credit:
ZeroVuln labs (reporter)
References:
https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f
https://couchdb.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-90797
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