CVE-2026-11789

Name: CVE-2026-11789
Creator: NVD / NIST
Published: 2026-06-09T14:16:37.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2026-11789 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.34%

25.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-191

Affected Software

Vendor	Product	Versions
Redhat	Directory Server	11.0
Redhat	Directory Server	12.0
Redhat	Directory Server	13.0
Redhat	389 Directory Server	All versions
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0
Redhat	Enterprise Linux	10.0

References

https://access.redhat.com/security/cve/CVE-2026-11789Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2485422Issue Tracking, Vendor Advisory
https://redhat.atlassian.net/browse/PSIRTSUPT-7600Permissions Required

Timeline

Published: Jun 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-11789?

How severe is CVE-2026-11789?

CVE-2026-11789 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2026-11789?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-11789?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST