CVE-2026-86471

EUVD-2026-105155
An unvalidated runtime configuration value in Apache CouchDB 3.5.2 and below on all platforms allows a CouchDB server admin to run arbitrary shell commands as the CouchDB operating system user.

Users are recommended to upgrade to version 3.5.3, which fixes this issue.
OS Command Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
9.3 CRITICAL
NETWORK
LOW
HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:A/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Base Score
CVSS 3.x
EPSS Score
Percentile: 48.24%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apachecouchdb
𝑥
< 3.5.3
CNA
Common Weakness Enumeration
References
https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f
https://lists.apache.org/thread/c8p73gswgogtnzvk7hpw8jb8d4mnosdp
http://www.openwall.com/lists/oss-security/2026/10/20/11