Authentication bypass via unsanitized GPO cache path
Published Jul 7, 2026 · Updated Aug 31, 2026
Path traversal in Red Hat SSSD's AD GPO provider allows remote authenticated users with GPO management access to write files as root. ad_gpo_extract_smb_components() converts backslashes in the gPCFileSysPath LDAP value but preserves dot-dot components, so the kernel resolves a cache filename outside /var/lib/sss/gpo_cache. AD GPO management and SysVol write access are required; on default SELinux-enforcing RHEL, writes can inject Kerberos configuration and bypass authentication.
Summary
What happened
Path traversal in Red Hat SSSD's AD GPO provider allows remote authenticated users with GPO management access to write files as root. ad_gpo_extract_smb_components() converts backslashes in the gPCFileSysPath LDAP value but preserves dot-dot components, so the kernel resolves a cache filename outside /var/lib/sss/gpo_cache. AD GPO management and SysVol write access are required; on default SELinux-enforcing RHEL, writes can inject Kerberos configuration and bypass authentication.
The record
- CVE
- CVE-2026-14476
- Published
- Jul 7, 2026
- Updated
- Aug 31, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat OpenShift Container Platform 4.16
- Classifications
- CWE-23, T1556
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 7, 2026CVE publishedPublication date reported by the CVE source.
- Aug 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- SSSD GPO path traversal standalone C reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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