CVE-2025-11979 Use-after-free in the MongoDB server query planner may lead to crash or undefined behavior

What is CVE-2025-11979?

CVE-2025-11979 is a medium-severity use after free vulnerability in Mongodb Mongodb, published on 20 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An authorized user may crash the MongoDB server by causing buffer over-read. This can be done by issuing a DDL operation while queries are being issued, under some conditions. This issue affects MongoDB Server v7.0 versions prior to 7.0.25, MongoDB Server v8.0 versions prior to 8.0.15, and MongoDB Server version 8.2.0.

Weakness: CWE-416

Which versions are affected by CVE-2025-11979?

1 open source package ship an affected version, including mongodb. It affects 1 product.

Products include Mongodb Mongodb.

How do I fix CVE-2025-11979?

Upgrade mongodb to a fixed version for your release line: 7.0.25 or 8.0.15.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2025-11979 being exploited?

There is no known exploitation of CVE-2025-11979 in the wild and no public exploit code.

Other vulnerabilities in Mongodb Mongodb

• CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Exploited High 8.7
• CVE-2026-82067 Auth bypass in MongoDB Server Critical 9.2
• CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption Critical 9.2
• CVE-2017-15535 Denial of service in n/a Critical 9.1
• CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure Critical 9.0

All Mongodb Mongodb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mongodb-2025-11979, GHSA-ghg7-x6j9-jm6p, MINI-6628-wm79-cg93, MINI-gv94-7pf2-c3fx.