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SSSD EUVDEUVD-2026-42023

| CVE-2026-14476 HIGH
Relative Path Traversal (CWE-23)
2026-07-07 redhat GHSA-v6qh-pm8g-3c5w
Authentication Bypass Path Traversal Red Hat Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Red Hat Openshift Container Platform 4 Red Hat
8.0
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
8.0 HIGH
AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
vuln.today AI
8.0 HIGH

Attacker needs AD GPO write access (PR:H) and target-path knowledge (AC:H) over LDAP (AV:N); root file write from a GPO-management context crosses a trust boundary (S:C) with full host CIA impact.

3.1 AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SUSE
HIGH
qualitative
Red Hat
8.0 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 07, 2026 - 10:32 vuln.today
CVE Published
Jul 07, 2026 - 09:12 nvd
HIGH 8.0

DescriptionCVE.org

A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.

AnalysisAI

Privilege escalation to root and Kerberos-based authentication bypass in SSSD's Active Directory GPO provider affects Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4. Because ad_gpo_extract_smb_components() fails to sanitize '..' sequences in the gPCFileSysPath LDAP attribute (CWE-23), an actor holding AD GPO management rights can force an SSSD-enrolled host to write attacker-controlled files outside the GPO cache as root, injecting Kerberos configuration to bypass authentication. There is no public exploit identified at time of analysis, and the flaw is not listed in CISA KEV.

Technical ContextAI

SSSD (System Security Services Daemon) is the standard Linux service that integrates hosts with Active Directory and LDAP for identity, authentication, and access-control policy. Its AD GPO provider retrieves Group Policy Objects over LDAP and SMB to enforce host-based access control (e.g., interactive-logon rights). The vulnerable path is ad_gpo_extract_smb_components(), which parses the gPCFileSysPath LDAP attribute of a GPO to derive an SMB path and a local cache location. Because the function does not neutralize directory-traversal ('..') sequences (CWE-23, Relative Path Traversal), a maliciously crafted gPCFileSysPath value can escape the intended GPO cache directory. Since SSSD runs as root, this becomes an arbitrary file write as root, and on default RHEL deployments with SELinux enforcing the practical impact is injection of Kerberos (krb5) configuration to subvert authentication decisions.

RemediationAI

No vendor-released patched package version is identified in the provided data; monitor and apply the Red Hat errata referenced at https://access.redhat.com/security/cve/CVE-2026-14476 and Bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=2496581 as soon as fixed sssd packages are published, then update all AD-joined RHEL and OpenShift 4 hosts. As compensating controls until patched: tighten Active Directory delegation so that only a minimal, trusted set of administrators can create or modify GPOs and edit the gPCFileSysPath attribute (removing the PR:H prerequisite for most actors); where feasible, disable the SSSD AD GPO provider or set ad_gpo_access_control to a mode that does not process untrusted GPO paths (trade-off: loss of GPO-based host access enforcement); and audit AD for unexpected GPO changes and SSSD hosts for unexpected root-owned files or altered krb5 configuration. Keep SELinux enforcing, but note it does not prevent this specific abuse on default configurations.

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Same weakness CWE-23 – Relative Path Traversal

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected
SUSE Linux Enterprise Micro 5.3 Affected

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EUVD-2026-42023 vulnerability details – vuln.today
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