What is CVE-2026-11789?

CVE-2026-11789 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under Integer Underflow. CVSS score: 4.9/10. Published 2026-06-09.

How severe is CVE-2026-11789?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Integer overflow in Red Hat Directory Server 11

CVE-2026-11789

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…

EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
secalert@redhat.com (Permissions Required)

Frequently asked questions

What is CVE-2026-11789?: CVE-2026-11789 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under Integer Underflow. CVSS score: 4.9/10. Published 2026-06-09.
How severe is CVE-2026-11789?: Medium severity. CVSS v3 base score is 4.9 out of 10.