libmongocrypt: Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible...
CVE-2026-106433 is fixed in libmongocrypt on 1 platform by DEBIAN-CVE-2026-106433 (version 1.20.5-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmongocrypt · Debian 14 | 1.20.5-1 | DEBIAN-CVE-2026-106433 | Oct 16, 2026 |
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