CVE-2026-103965

Fixed values in MongoDB Server $bucket stage may be misread as field references

State: Published
Severity: 5.3 Medium
Published: Oct 13, 2026
Updated: Oct 13, 2026
Reserved: Oct 1, 2026

Description

An issue in MongoDB Server's aggregation framework can cause certain constant values to be handled incorrectly during internal query rewriting. Under certain conditions, an authenticated user with read access may receive field values in aggregation output that the query did not intend to return.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	mongodb
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	mongodb

Weaknesses

CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
MongoDB ServerMongoDB	8.3.0 to before 8.3.13Affected 8.0 to before 8.0.34Affected 7.0 to before 7.0.45Affected 9.0 to before 9.0.4Affected

References

https://jira.mongodb.org/browse/SERVER-134618

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