libmongocrypt: The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged ins...
CVE-2026-106434 is fixed in libmongocrypt on 1 platform by DEBIAN-CVE-2026-106434 (version 1.20.5-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
The explicit decryption component of MongoDB libmongocrypt can return an unrecognized encrypted payload unchanged instead of returning a decryption error. An actor who can modify stored encrypted fields, such as a database writer, server, or network intermediary, can cause an affected application to process the supplied bytes as decrypted plaintext.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmongocrypt · Debian 14 | 1.20.5-1 | DEBIAN-CVE-2026-106434 | Oct 16, 2026 |
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