CVE-2026-104004

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

CVE-2026-104004 is fixed in MongoDB on 1 platform by MongoDB 9.0.4 (version 9.0.4), released October 8, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.1

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0024

14th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
MongoDB	9.0.4	MongoDB 9.0.4	Oct 8, 2026

Details

Published
October 13, 2026
Weakness
CWE-476: NULL Pointer Dereference
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-104004

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