CVE-2026-84962 PUBLISHED

Authenticated KMS request forgery via CRLF injection in GCP key identifier strings

Assigner: mongodb
Reserved: 02.09.2026 Published: 03.09.2026 Updated: 03.09.2026

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.

CVSS Vector: 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 Score: 5.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	High	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	High
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
CVSS Score: 4.2

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	None
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	MongoDB
Product	libmongocrypt
Versions	Default: unaffected affected from 0 to 1.20.2 (excl.)

References

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

Problem Types

CWE-93 CWE