CVE-2026-84971

NameCVE-2026-84971
DescriptionImproper handling of an unexpected value size in the decryption path of a client-side encryption library can cause a failed internal check that terminates the process using the library. A party able to place a suitably formed encrypted value where an application will decrypt it, or able to control the responses the application receives, may cause that application to stop running.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libmongocrypt (PTS)bookworm1.7.2-1vulnerable
trixie1.13.2-1vulnerable
forky1.20.3-1vulnerable
sid1.20.4-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libmongocryptsource(unstable)1.20.4-1

Notes

https://jira.mongodb.org/browse/MONGOCRYPT-971

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