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Fencer Vulns
medium 5.0

CVE-2026-11787 json

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

published 2026-06-09 5 mo ago modified 2026-11-05 3 d ago also EUVD-2026-35419

cvss
5.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

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.

Patch / fix

  • 389-ds SLES for SAP applications 16.0, SLES 16.0 3.0.6~git382.7a51ea5f5-160000.1.1
  • 389-ds SLE Module for Server Applications 15 SP7 2.7.0~git212.9b0755edb-150700.3.19.1
  • 389-ds SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 2.2.10~git255.752643c78-150500.3.48.1
  • 389-ds SLES for SAP 15 SP6, SLES 15 SP6-LTSS 2.2.10~git255.752643c78-150600.8.32.1

suse advisories SUSE-SU-2026:23574-1SUSE-SU-2026:3138-1SUSE-SU-2026:3137-1SUSE-SU-2026:3136-1

  • 389-ds openSUSE Leap 16.0 3.0.6~git382.7a51ea5f5-160000.1.1
  • 389-ds openSUSE Tumbleweed 3.2.2+4b41542b2-1.1

opensuse advisories openSUSE-SU-2026:21691-1openSUSE-SU-2026:11600-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-11787 updated cvss 5.0

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

  • Red Hat Directory Server 11 389-ds-base 1.4.3.39-21.module+el8dsrv+24083+d25fcbb4 Red Hat Directory Server 12 389-ds-base 2.8.0-6.module+el9dsrv+24230+6f167244 Red Hat Directory Server 13 389-ds-base 3.2.0-5.el10dsrv
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 6 389-ds-base, 389-ds-base-libs, 389-ds-base 3.2.0-5.el10dsrv
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 389-ds-base, 389-ds-base-libs, 389-ds-base-snmp, 389-ds-base 3.2.0-5.el10dsrv Red Hat Enterprise Linux 8 389-ds-base, cockpit-389-ds, python3-lib389, 389-ds-base-libs, 389-ds-base-snmp, 389-ds-base-legacy-tools, +1 more Red Hat Enterprise Linux 9 389-ds-base, python3-lib389, 389-ds-base-libs, 389-ds-base-snmp, 389-ds-base 3.2.0-5.el10dsrv Red Hat Enterprise Linux 10 389-ds-base 3.2.0-5.el10dsrv
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 6.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected products

  • Red Hat Red Hat Directory Server 11
  • Red Hat Red Hat Directory Server 12
  • Red Hat Red Hat Directory Server 13
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.