Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update
Affects Red Hat 389-ds-base security,Source GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 6 Nov 2026, 03:03 UTC
Sources agree
| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 7.5 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| 389-ds-base | Affected
| Fixed in– |
GitHub389-ds-basepkg:github/389-ds-baseOther threats | Affected
| 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 update for 389-ds-base that addresses this vulnerability. Users should apply the update as detailed in the Red Hat advisory RHSA-2026:26455. The advisory provides instructions and package details for remediation. No additional mitigation steps are indicated or required beyond applying the official patch.
Description
A security vulnerability (CVE-2026-9064) in 389 Directory Server (389-ds-base) allows remote attackers to cause CPU and heap amplification leading to a denial of service (DoS) via unbounded LDAP controls count in the get_ldapmessage_controls_ext() function. This issue affects Red Hat Enterprise Linux 9 and related distributions. Red Hat has released an update to address this vulnerability along with several bug fixes and enhancements.