What’s Vulnerable › Vulnerabilities
CVE-2026-104004: Collection validators using collation-accepting expressions can crash MongoDB Server on insert
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-15
- Weakness: CWE-476
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.
Affected products
- MongoDB: from 8.3.0 before 8.3.13; from 8.0 before 8.0.34; from 9.0 before 9.0.4 — fixed in 8.0.34, 8.3.13, 9.0.4
How to fix
Upgrade to a fixed version: MongoDB 8.0.34, 8.3.13, 9.0.4. Check the vendor advisory for mitigations.
References
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