CVE-2026-84962

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

MEDIUM
4.2
CVSS Score
Published: September 3, 2026 at 03:03 PM UTC
Updated: September 17, 2026 at 02:13 PM UTC
1 product affected across 1 vendorLibmongocrypt

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Severity
MEDIUM4.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.20.2
Affected range stops below 1.20.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

Vendor AdvisoryPermissions Required
Source: cverecord
https://jira.mongodb.org/browse/MONGOCRYPT-960

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.2MEDIUMmongodb
Attack Vector
NETWORK
Complexity
HIGH
Privileges
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-93

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