CVE-2026-11787: Red Hat 389 Directory Server

Medium severity, CVSS 6.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in 389 Directory Server. The ldap_utf8prev() function reads bytes before the start of a buffer without bounds checking, causing a heap buffer over-read in string filter parsing that may influence internal filter processing behavior.

Affected products

• Red Hat 389 Directory Server: affected versions not specified
• Red Hat Directory Server: version 11.0 only; version 12.0 only; version 13.0 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only

Published 2026-06-09. Last modified 2026-07-23.