CVE-2026-86471

Apache CouchDB: Admin credentials leading to code execution as operating system user

9.3 CriticalFix available

CVE-2026-86471 is a critical vulnerability (CVSS 9.3) in Apache Software Foundation Couchdb, published October 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.61%, the 49th percentile. Fixed in couchdb 3.5.3.

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: Low

Exploit likelihood

0.61%Unchanged since Oct 21, 2026

What each source reports

CVE List Score used 9.3

Apache CouchDB: Admin credentials leading to code execution as operating system user

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.

Record: CVE-2026-86471
CVSS 4.0: 9.3 CriticalCVSS: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
Weakness: CWE-78
Updated: 2026-11-02

EUVDEUVD-2026-105155 9.3

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.

Record: EUVD-2026-105155
CVSS 4.0: 9.3 CriticalCVSS: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
Updated: 2026-11-02

GitHub AdvisoriesGHSA-885r-pfpm-ch95 9.3

An unvalidated runtime configuration value in Apache CouchDB 3.5.2 and below on all platforms...

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.

Record: GHSA-885r-pfpm-ch95
CVSS 4.0: 9.3 CriticalCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Weakness: CWE-78
Updated: 2026-11-02

NVD 9.3

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.

Record: CVE-2026-86471
CVSS 4.0: 9.3 CriticalCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Weakness: CWE-78
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-86471 9.3

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.

Record: UBUNTU-CVE-2026-86471
CVSS 4.0: 9.3 CriticalCVSS: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
Updated: 2026-11-02

OSVBIT-couchdb-2026-86471 No score

Apache CouchDB: Admin credentials leading to code execution as operating system user

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.

Record: BIT-couchdb-2026-86471
Updated: 2026-11-02

Affected products

apache software foundation couchdb

Affected packages

Affected packages
Package	Affected	Fixed
`couchdb` Bitnami	before 3.5.3	3.5.3
`couchdb` Ubuntu:16.04:LTS	All versions, plus listed versions 1.6.0-0ubuntu7	None known

History

History
When	Changed	Sources
2026-11-02	created	CVE List, EUVD, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References