High severity7.5NVD Advisory· Published Sep 7, 2026

CVE-2026-18453

Description

A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

389 Directory Server/389 Directory Serverllm-fuzzy

Patches

Vulnerability mechanics

References

access.redhat.com/security/cve/CVE-2026-18453nvd
bugzilla.redhat.com/show_bug.cginvd

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