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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-106433

Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

MongoDB libmongocrypt

Default version status: unaffected

  • 1.1.0 to < 1.20.5affected

References