{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-92821", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-16T20:30:01.964Z", "datePublished": "2026-10-06T00:12:23.782Z", "dateUpdated": "2026-10-06T00:12:23.782Z"}, "containers": {"cna": {"title": "Sssd: sssd: access control bypass via premature ldap access rule evaluation", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in SSSD. When configured to evaluate password expiration warnings before restrictive access rules in LDAP (Lightweight Directory Access Protocol) environments, an expired-password warning terminates rule evaluation early and treats the access request as successful. A remote authenticated user with an expired password using an alternative authentication method, such as SSH public key authentication, can exploit this flaw to bypass access control restrictions and gain unauthorized access to protected systems."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "sssd", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:10"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "sssd", "defaultStatus": "unknown", "cpes": ["cpe:/o:redhat:enterprise_linux:6"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "sssd", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:7"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "sssd", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "sssd", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "openshift/ose-rhel-coreos-8", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "openshift/ose-rhel-coreos-9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-92821", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479031", "name": "RHBZ#2479031", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-10-05T23:50:06.924Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-393", "description": "Return of Wrong Status Code", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-393: Return of Wrong Status Code", "workarounds": [{"lang": "en", "value": "To mitigate this issue without applying package fixes, reconfigure SSSD access ordering so that password expiration warnings do not precede restrictive access rules.\n\n1. Modify `/etc/sssd/sssd.conf` in the relevant domain section:\n- Place `pwd_expire_policy_warn` after restrictive rules in `ldap_access_order` (e.g., change `ldap_access_order = pwd_expire_policy_warn, filter, host` to `ldap_access_order = filter, host, pwd_expire_policy_warn`).\n- Alternatively, replace `pwd_expire_policy_warn` with `pwd_expire_policy_reject` if expired accounts must not proceed through subsequent checks.\n\n2. Restart the SSSD service to apply the configuration:\n```\nsystemctl restart sssd\n```\n\nWarning: Restarting SSSD causes a brief disruption to active authentication requests and identity lookups. Additionally, altering access rules or switching to `pwd_expire_policy_reject` may alter user access behavior by immediately denying accounts with expired credentials."}], "timeline": [{"lang": "en", "time": "2026-05-18T03:32:25.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-10-05T23:50:06.924Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "This issue was discovered by Found by AISLE in partnership with Red Hat."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-06T00:12:23.782Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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