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CVE-2026-11610VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Directory Server 13.2 container image update

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-11610· High 8.8

Not known to be exploited · CVSS 8.8 High.

Data as of 5 Nov 2026, 18:02 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.18.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Jul 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
389ds389-ds-baseAffected
  • >=1.3.2 <=3.3.0
Fixed in–
GitHub389-ds-basepkg:github/389-ds-baseOther threatsAffected
  • >=1.3.2 <=3.3.0
Fixed in–

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

AI-suggested

A fixed Red Hat Directory Server 13.2 container image is available and should be deployed to remediate this vulnerability. There is no complete workaround. Mitigations to reduce exposure include restricting network access to LDAP ports (389/636) to trusted networks, disabling DIGEST-MD5 SASL mechanism if not required, monitoring for oversized LDAP UNBIND packets (alert on packets exceeding approximately 100 bytes), and lowering the nsslapd-maxbersize parameter to reduce overflow size. Note that disabling GSSAPI/Kerberos is not practical in FreeIPA/IdM deployments as it breaks domain authentication. Users should pull the updated container image from the Red Hat container registry using the provided podman pull command.

Description

CVE-2026-11610 is a heap buffer overflow vulnerability in the SASL I/O layer of the 389 Directory Server (389-ds-base) used in Red Hat Directory Server 13.2 container images. After a successful SASL bind with integrity protection, an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet that overflows a 512-byte heap buffer, causing a denial of service by crashing the server. The vulnerability affects any user who can authenticate via SASL mechanisms such as GSSAPI/Kerberos or DIGEST-MD5. There is no complete workaround, but mitigations include restricting LDAP network access and disabling DIGEST-MD5 if not required. A fixed container image is available from Red Hat.

References

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