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CVE-2026-11786 Red Hat CVE debrief

CVE-2026-11786 is a low-severity vulnerability affecting 389 Directory Server. The issue arises from the LDIF parser reading past the end of a heap buffer when processing attribute types with trailing semicolons during database import, leading to an out-of-bounds read. This vulnerability is detectable under memory instrumentation.

Vendor
Red Hat
Product
Red Hat Directory Server 11
CVSS
LOW 1.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-30
Advisory published
2026-06-09
Advisory updated
2026-06-30

Who should care

Users of Red Hat Directory Server, particularly those using versions 11.0, 12.0, and 13.0, as well as Red Hat Enterprise Linux versions 7, 8, 9, and 10, should be aware of this vulnerability.

Technical summary

The vulnerability has a CVSS score of 1.9, indicating a low severity. It is classified under CWE-125. The CVSS vector is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N, indicating a local attack vector with high attack complexity and privileges required.

Defensive priority

Low

Recommended defensive actions

  • Apply patches or updates provided by Red Hat to address the vulnerability.
  • Review and update configurations to ensure that only authorized users have access to the Directory Server.
  • Monitor the system for any suspicious activity that could be related to this vulnerability.

Evidence notes

Evidence for this CVE comes from the National Vulnerability Database (NVD) and Red Hat's security advisory.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11786 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11786

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11786 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11786

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.