CVE-2026-13057

Authorization Bypass via Client-Supplied $search.mergingPipeline Leaks Unauthorized Collection Data Through $$SEARCH_META

State: Published
Severity: 6.0 Medium
Published: Jul 22, 2026
Updated: Jul 23, 2026
Reserved: Jun 23, 2026

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Description

An issue in the server’s Atlas Search integration allows an authenticated user to bypass per-user access controls.

In sharded topologies, the $search and $searchMeta aggregation stages use internal routing that is normally populated only by the trusted router during sharded search planning. Due to insufficient input validation, an authenticated client can supply these fields directly.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	mongodb
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N	mongodb

Weaknesses

CWE-20 Improper input validation

Affected Products

Product	Versions
MongoDB ServerMongoDB	8.0 to before 8.0.28Affected 8.3.0 to before 8.3.7Affected 8.2.0 to before 8.2.12Affected

References

https://jira.mongodb.org/browse/SERVER-126247

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