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VULNERABILITIES

CVE-2026-84971 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://jira.mongodb.org/browse/MONGOCRYPT-971 [email protected]Vendor AdvisoryIssue TrackingPatch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-617Reachable Assertion[email protected]

Affected Products

ProductVersions
mongodb libmongocrypt
>= 1.7.0, < 1.20.4

CPE

  • cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-84971
NVD Published Date:
Sep 3, 2026
NVD Last Modified:
Sep 17, 2026
Source:
[email protected]
CVE-2026-84971 Details - Not Deferred