CVE-2026-90797CWE-409

CVE-2026-90797

published October 20, 2026

CVSS
7.7
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
7.7 · NONE
CVSS v4.0
7.7 · 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
EPSS
0.00669 · 51.4th percentile
Weakness
CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)
Published
2026-10-20T20:17Z
References (3)
https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f · [email protected]https://lists.apache.org/thread/gsbotof0qn8x6zlpd7t568ny4053jo0n · [email protected]http://www.openwall.com/lists/oss-security/2026/10/20/12 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 22 OCT 03:36Z
    EPSS moved — → 1%
    epss
  • 20 OCT 15:39Z
    Apache CouchDB: Pre-authentication gzip decompression bomb via POST /_session
    cvelistv5
  • 20 OCT 15:39Z
    Apache CouchDB: Pre-authentication gzip decompression bomb via POST /_session
    cvelistv5