All vulnerabilities
CVE-2026-104004

Collection validators using collation-accepting expressions can crash MongoDB Server on insert

MongoDB MongoDB ServerDatabases
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 13% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in8.3.13Also 8.0.34, 9.0.4CVE List
Published13 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

MongoDB Server's collection validation feature may not properly handle certain expressions stored in a validator. In some cases, this can cause the server process to stop running when a document is later inserted. The behavior can occur for authenticated users with write access.

Text from CVE List

Affected versions 3

  • MongoDB Serveraffected: 8.3.0 before 8.3.13CVE List
  • MongoDB Serveraffected: 8.0 before 8.0.34CVE List
  • MongoDB Serveraffected: 9.0 before 9.0.4CVE List

References 1