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CVE-2026-11787

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

Published: Jun 9, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-126
5.0MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 92.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-126

Affected Products

Red Hat
commercial·USaka redhat
Red Hat Directory Server 11On-premDatabase
Databases / relational
Red Hat Directory Server 12On-premDatabase
Databases / relational
Red Hat Directory Server 13On-premDatabase
Databases / relational
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
directory serverOn-prem
Operating Systems / linux-distro
389 directory serverOn-prem
Operating Systems / linux-distro
and 5 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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References

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

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