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389 Directory Server CVE-2026-11785

| EUVDEUVD-2026-35418 MEDIUM
Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)
2026-06-09 redhat GHSA-8v22-4r9h-6m6j
4.3
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SUSE
MEDIUM
qualitative
Red Hat
4.3 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Jun 09, 2026 - 13:54 vuln.today
CVE Published
Jun 09, 2026 - 12:57 nvd
MEDIUM 4.3

DescriptionCVE.org

A flaw was found in 389 Directory Server. A type confusion in the SSO token extended operation handler causes partial stack address information to be disclosed in LDAP responses to authenticated users.

AnalysisAI

Partial stack address disclosure in Red Hat 389 Directory Server (versions 11, 12, and 13) allows authenticated remote users to extract memory layout information via crafted LDAP extended operation requests. The root cause is a CWE-843 type confusion in the SSO token extended operation handler, which causes stack pointer data to bleed into LDAP response payloads. While the direct impact is limited to low-confidence information disclosure, leaked stack addresses are a classic ASLR-weakening primitive that could facilitate chained exploitation. No public exploit has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.

Technical ContextAI

389 Directory Server (the upstream open-source project shipping as Red Hat Directory Server 11/12/13 and bundled with RHEL 6 through 10 via the corresponding CPE strings) implements LDAP extended operations - protocol-level request/response pairs for vendor-specific features. The SSO token extended operation handler contains a CWE-843 (Type Confusion) defect: the handler allocates or interprets internal data under one type and subsequently accesses it under an incompatible type, causing the LDAP response serialization to inadvertently embed partial stack address values. Because the leaked values originate from the stack, this disclosure can weaken Address Space Layout Randomization (ASLR), a key exploit-mitigation technique. The tags 'Information Disclosure' and 'Memory Corruption' both appear, suggesting the type confusion also produces undefined memory state internally, even if only the information leak is currently demonstrated.

RemediationAI

No vendor-released patch version was identified in the available intelligence at time of analysis; patch status should be confirmed against the Red Hat Security Advisory at https://access.redhat.com/security/cve/CVE-2026-11785 and the internal tracking ticket at https://redhat.atlassian.net/browse/PSIRTSUPT-7600. Until a patch is applied, administrators can reduce exposure by restricting LDAP access to the SSO token extended operation (OID-level ACIs in 389-ds can be configured to deny specific extended operation requests to untrusted accounts, limiting who can trigger the vulnerable handler). Additionally, enforcing strong authentication requirements for LDAP binds (e.g., requiring certificate-based or SASL GSSAPI bind rather than simple bind) raises the bar for the PR:L prerequisite. If 389-ds is not required to be Internet-facing, restricting TCP port 389/636 access to known management subnets via firewall rules eliminates the AV:N vector entirely with no service degradation for internal users. Note that the 'Memory Corruption' tag warrants monitoring the Red Hat advisory for a severity upgrade if a more exploitable variant is confirmed.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected
SUSE Linux Enterprise Server 16.1 Affected

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CVE-2026-11785 vulnerability details – vuln.today

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