CVE-2026-84971

EUVD-2026-70507
Improper 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 16.4%
Affected Products (NVD)
VendorProductVersion
mongodblibmongocrypt
1.7.0 ≤
𝑥
< 1.20.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libmongocrypt
bookworm
postponed
forky
1.20.5-1
fixed
sid
1.21.0-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libmongocrypt
jammy
needs-triage
noble
needs-triage
resolute
needs-triage