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CVE-2026-9064VulnerabilityPublished Updated

Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update

Affects Red Hat 389-ds-base security,Source GCVE Database

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Authoritative record:CVE-2026-9064· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 6 Nov 2026, 03:03 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CNA (redhat)CVSS 3.17.5
ADP (redhat-SADP)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
389-ds-baseAffected
  • =0
Fixed in–
GitHub389-ds-basepkg:github/389-ds-baseOther threatsAffected
  • =0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an updated 389-ds-base package that addresses this vulnerability. Users should apply the update as provided in Red Hat Security Advisory RHSA-2026:26456 for Red Hat Enterprise Linux 10 and related products. The vendor provides detailed instructions for applying the update. No additional mitigation steps are specified beyond applying the official patch.

Description

A security vulnerability (CVE-2026-9064) in 389 Directory Server's 389-ds-base component allows unbounded LDAP controls count in the get_ldapmessage_controls_ext() function, leading to CPU and heap amplification that can cause a remote denial of service (DoS). This issue affects Red Hat Enterprise Linux 10 and related distributions. The vendor has released an update addressing this vulnerability along with multiple bug fixes and enhancements.

References

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