CVE-2026-106434 Affecting libmongocrypt package, versions <1.20.5-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Oct 2026
- disclosed8 Oct 2026
Introduced: 8 Oct 2026
NewCVE-2026-106434 (opens in a new tab)How to fix?
Upgrade Debian:unstable libmongocrypt to version 1.20.5-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libmongocrypt package and not the libmongocrypt package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.