CVE-2026-84962

5.7 mediumEPSS 0.2%

Medium (5.7) in mongodb libmongocrypt. EPSS 0.2% chance of exploitation in the next 30 days.

An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.

Severity

CVSS 4.0

5.7 medium

CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.2 medium

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
CWE: CWE-93
Published: 2026-09-03
Modified: 2026-09-17
Record from: the NVD, synced 2026-10-19

Affected

mongodb:libmongocrypt

References

https://jira.mongodb.org/browse/MONGOCRYPT-960

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