CVE-2026-106433 — Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt
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 ma…
Published: 2026-10-08 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7