CVE-2026-11787 — MEDIUM (5.0)

Vulnerability 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.

CVSS Score

5.0

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Redhat	Directory Server	11.0
Redhat	389 Directory Server	-
Redhat	Enterprise Linux	7.0

Related Weaknesses (CWE)

CWE-126

References

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

FAQ

What is CVE-2026-11787?

CVE-2026-11787 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 m...

How severe is CVE-2026-11787?

CVE-2026-11787 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-11787?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Directory Server, Redhat 389 Directory Server, Redhat Enterprise Linux.