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CVE-2026-14940

5.3 · MEDIUM

A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base).

Published Jul 7, 2026CWE-122EPSS 0.49%

Overview

CVE-2026-14940 is a medium-severity vulnerability. It was published on July 7, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When

normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a

multivalued nested Relative Distinguished Name (RDN), the server can write past the

end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated

remote attacker can trigger this condition by sending an LDAP operation whose DN

reaches the DN normalization routine, such as a search with a crafted base DN. This

can corrupt heap memory and may cause denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/security/cve/CVE-2026-14940Refbugzilla.redhat.com/show_bug.cgi?id=2497697

How CyberStrike helps

Frequently asked questions

What is CVE-2026-14940?

CVE-2026-14940 is a medium-severity vulnerability. It was published on July 7, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-14940?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-14940?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-14940?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-14940 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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