Is CVE-2026-117548 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-117548 being exploited in the wild.

How severe is CVE-2026-117548?

Medium severity, with a CVSS score of 6.5, published 29 October 2026.

How is CVE-2026-117548 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-117548?

Check whether you run Red Hat 389-Ds-Base. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-117548: 389-ds-base NULL pointer dereference in ModifyDN

CVE-2026-117548 · Severity: medium · CVSS 6.5 · Published 2026-10-29

389-ds-base is a Lightweight Directory Access Protocol (LDAP) server used to manage user identities and access in enterprise environments. An authenticated attacker with ModifyDN (rename) permissions can trigger a NULL pointer dereference by using an attribute's alias name instead of its canonical name, causing the directory server to crash and denying service to all users who depend on it.

Technologies: Red Hat 389-Ds-Base. Vendors: Red Hat.

Quick answers

Is CVE-2026-117548 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-117548 being exploited in the wild.
How severe is CVE-2026-117548?: Medium severity, with a CVSS score of 6.5, published 29 October 2026.
Which products and versions are affected?: Red Hat 389-ds-base.
Is there a fix for CVE-2026-117548?: No fixed version is recorded yet. Administrators should review custom access control instructions (ACIs) and avoid granting the ModifyDN (rename) right to non-administrative principals unless specifically required. Restrict this right to reduce exposure until a fixed package is available. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-117548 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-117548?: Check whether you run Red Hat 389-Ds-Base. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Administrators should review custom access control instructions (ACIs) and avoid granting the ModifyDN (rename) right to non-administrative principals unless specifically required. Restrict this right to reduce exposure until a fixed package is available.

Technical details

A NULL pointer dereference flaw (CWE-476) occurs in 389-ds-base when a ModifyDN operation uses a schema alias name (e.g. "commonName") instead of the canonical name (e.g. "cn") as the new relative distinguished name. The vulnerability requires an authenticated attacker with explicit ModifyDN permissions on the affected entry; it is not present in default configurations and exploitation requires administrators to have granted non-administrative principals this right via custom access control instructions (ACIs).

Affected products

Red Hat 389-ds-base

Timeline

2026-10-29: disclosed

References

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