CVE-2026-14476

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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. 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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."}], "id": "CVE-2026-14476", "lastModified": "2026-11-05T17:18:07.623", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 6.0, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-14476", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-07T14:34:29.054689Z", "version": "2.0.3"}}]}, "published": "2026-07-07T10:16:39.993", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:41937"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:42122"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:46482"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:46990"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49839"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49840"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49841"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49842"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49843"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:49844"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:50109"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54187"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54553"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54581"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54599"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:54769"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:56786"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:56853"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:56911"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:57483"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:59831"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:60019"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-14476"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2496581"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-23"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Ian Murphy (Red Hat).", "bugzilla": {"description": "sssd: sssd: GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass", "id": "2496581", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2496581"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-23", "details": ["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."], "mitigation": {"lang": "en:us", "value": "Set ad_gpo_access_control = disabled in /etc/sssd/sssd.conf to disable GPO fetching entirely. Note that this removes GPO-based login policy enforcement."}, "name": "CVE-2026-14476", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-07-07T09:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-14476\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-14476"], "statement": "Red Hat has rated this as Moderate because exploitation requires high privileges (AD GPO management access) and on default RHEL configurations with SELinux enforcing, the realistic impact is limited to Kerberos authentication bypass via krb5 configuration injection. SELinux blocks writes to most security-critical paths such as /etc/cron.d/.", "threat_severity": "Moderate"}

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