CVE-2026-11787 | BDVDB-2026-338795 Detail

Red HatRed Hat Directory Server 11

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-126 Buffer Over-read

References#

Exploit#

No public exploit known

History#

Version 12026-06-09Record published in the CVE List.
Version 22026-11-05Most recent update recorded in the CVE List.

Published

Published: 2026-06-09
Last modified: 2026-11-05

Vendor information

Vendor: Red Hat
Product: Red Hat Directory Server 11

All Red Hat vulnerabilities

Score

5.0 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 7.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.0 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).