What is CVE-2026-11788?

CVE-2026-11788 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under NULL Pointer Dereference. CVSS score: 5.9/10. Published 2026-06-09.

How severe is CVE-2026-11788?

Medium severity. CVSS v3 base score is 5.9 out of 10.

NULL pointer dereference in Red Hat Directory Server 11

CVE-2026-11788

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memo…

EPSS: 0.003 (27.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

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-2026-11788?: CVE-2026-11788 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under NULL Pointer Dereference. CVSS score: 5.9/10. Published 2026-06-09.
How severe is CVE-2026-11788?: Medium severity. CVSS v3 base score is 5.9 out of 10.