6.3

CVE-2026-11787: redhat 389_directory_server Buffer Over-read

CVSS: 6.3v3.1MediumModified
AliasesUBUNTU-CVE-2026-11787DEBIAN-CVE-2026-11787
Published 09-06-2026Last modified 30-06-2026
Open JSON

Vulnerability summary

CVE-2026-11787 is a medium (CVSS 6.3) Buffer Over-read vulnerability in redhat 389_directory_server. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.8% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 6
OPENSUSE-SU-2026:11600-1OPENSUSE-SU-2026:21691-1SUSE-SU-2026:23574-1SUSE-SU-2026:3136-1SUSE-SU-2026:3137-1SUSE-SU-2026:3138-1

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat3 products
Debian1 product
  • 389-ds-baseAll versions (No fix recorded)
Ubuntu1 product
  • 389-ds-baseAll versions (No fix recorded)

3 vendors · 5 products

References

6 links