What’s Vulnerable › Vulnerabilities

CVE-2026-11787: 389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter parsing

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-07-23
• Weakness: CWE-126

Description

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: all versions
• RedHat Directory Server: 11.0, 12.0, 13.0
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0

References

• https://access.redhat.com/security/cve/CVE-2026-11787
• https://bugzilla.redhat.com/show_bug.cgi?id=2485425

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