A use-after-free issue exists in the MongoDB server’s classic query engine plan cache. Under certain query conditions, an unowned reference to data from an earlier command can be retained in cached plan statistics. After the originating memory is freed, a subsequent diagnostic command serializing those statistics can read freed heap memory, potentially returning sensitive server process memory contents to the authenticated client. Under certain heap reuse conditions, this may also cause the server to crash.
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
| Link | Providers |
|---|---|
| https://jira.mongodb.org/browse/SERVER-135353 |
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History
Tue, 10 Nov 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A use-after-free issue exists in the MongoDB server’s classic query engine plan cache. Under certain query conditions, an unowned reference to data from an earlier command can be retained in cached plan statistics. After the originating memory is freed, a subsequent diagnostic command serializing those statistics can read freed heap memory, potentially returning sensitive server process memory contents to the authenticated client. Under certain heap reuse conditions, this may also cause the server to crash. | |
| Title | Use-After-Free in MongoDB Server Classic Query Engine Plan Cache Leads to Information Disclosure and Denial of Service | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: mongodb
Published:
Updated: 2026-11-10T20:10:09.182Z
Reserved: 2026-11-02T22:54:21.592Z
Link: CVE-2026-120811
Vulnrichment
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NVD
Status : Received
Published: 2026-11-10T20:18:51.613
Modified: 2026-11-10T20:18:51.613
Link: CVE-2026-120811
Redhat
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OpenCVE Enrichment
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Weaknesses