What is CVE-2025-12893?

CVE-2025-12893 is a medium-severity vulnerability in MongoDB, classified under Improper Certificate Validation. CVSS score: 4.2/10. Published 2025-11-25.

How severe is CVE-2025-12893?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in MongoDB

CVE-2025-12893

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

Vulnerability class: Improper Certificate Validation

Published 2025-11-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

MongoDB
MongoDB Inc. Server — versions 7.0, 8.0, 8.2

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

jira.mongodb.org/browse/SERVER-105783 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-12893?: CVE-2025-12893 is a medium-severity vulnerability in MongoDB, classified under Improper Certificate Validation. CVSS score: 4.2/10. Published 2025-11-25.
How severe is CVE-2025-12893?: Medium severity. CVSS v3 base score is 4.2 out of 10.