CVE-2026-11933

Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion

State: Published
Severity: 8.7 High
Published: Jun 12, 2026
Updated: Jun 13, 2026
Reserved: Jun 10, 2026

Description

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	mongodb
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	mongodb

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
MongoDBMongoDB	8.3.0 through 8.3.3Affected 8.2.0 through 8.2.10Affected 8.0.0 through 8.0.25Affected 7.0.0 through 7.0.36Affected 6.0 through 6.0.28Affected 5.0 through 5.0.33Affected 4.4.0 through 4.4.30Affected

References

https://jira.mongodb.org/browse/SERVER-128125

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