CVE-2026-106433

Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible type when cleaning up a key document containing duplicate masterKey fields. An authenticated actor who can modify key vault documents, or a server that returns such a key document, can cause invalid memory access and invalid frees in the client process. This can terminate the application or corrupt process memory.

Score
CVSS 3.1 8.8 High
Status
Analyzed - cna@mongodb.com
Published
2026-10-08
Last modified
2026-10-27
Weaknesses
CWE-843

Affected products

References

 
 
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