BaseFortify

Publication date: 2025-11-25

Last updated on: 2025-12-05

Assigner: MongoDB, Inc.

Description

Clients may successfully perform a TLS handshake with a MongoDB server despite presenting a client certificate not aligning with the documented Extended Key Usage (EKU) requirements. A certificate that specifies extendedKeyUsage but is missing extendedKeyUsage = clientAuth may still be successfully authenticated via the TLS handshake as a client. This issue is specific to MongoDB servers running on Windows or Apple as the expected validation behavior functions correctly on Linux systems. Additionally, MongoDB servers may successfully establish egress TLS connections with servers that present server certificates not aligning with the documented Extended Key Usage (EKU) requirements. A certificate that specifies extendedKeyUsage but is missing extendedKeyUsage = serverAuth may still be successfully authenticated via the TLS handshake as a server. This issue is specific to MongoDB servers running on Apple as the expected validation behavior functions correctly on both Linux and Windows systems. This vulnerability affects MongoDB Server v7.0 versions prior to 7.0.26, MongoDB Server v8.0 versions prior to 8.0.16 and MongoDB Server v8.2 versions prior to 8.2.2

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-11-25

Last Modified

2025-12-05

Generated

2026-07-06

AI Q&A

2025-11-25

EPSS Evaluated

2026-07-05

NVD

CVE-2025-12893

EUVD

EUVD-2025-199532

Affected Vendors & Products

Vendor	Product	Version / Range
mongodb	mongodb	From 7.0.0 (inc) to 7.0.26 (exc)
mongodb	mongodb	From 8.0.0 (inc) to 8.0.16 (exc)
mongodb	mongodb	From 8.2.0 (inc) to 8.2.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

This vulnerability allows clients to successfully perform a TLS handshake with a MongoDB server even if their client certificate does not meet the documented Extended Key Usage (EKU) requirements. Specifically, a certificate missing the required 'clientAuth' EKU can still be authenticated as a client on MongoDB servers running on Windows or Apple. Similarly, MongoDB servers on Apple can establish TLS connections with servers presenting certificates missing the 'serverAuth' EKU. This means the expected certificate validation is bypassed on these platforms.

Impact Analysis

This vulnerability can impact you by allowing unauthorized or improperly validated certificates to be accepted during TLS handshakes with MongoDB servers on Windows or Apple platforms. This could potentially allow unauthorized clients or servers to connect securely, undermining the intended security controls and possibly exposing sensitive data or systems to unauthorized access.

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