{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-19278", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-08-07T15:16:51.217Z", "datePublished": "2026-08-10T12:13:40.169Z", "dateUpdated": "2026-08-10T12:13:40.169Z"}, "containers": {"cna": {"title": "Stackrox: stackrox: privilege escalation via unanchored regular expressions in auth m2m role mappings", "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 StackRox/RHACS Central's Auth Machine-to-Machine (M2M) token exchange. When an administrator configures M2M role mappings, the system uses unanchored regular expressions for matching claim values. This allows an attacker with a valid OpenID Connect (OIDC) token, whose claim value is a superstring of a configured pattern, to gain unauthorized access to roles they were not intended to receive. This can lead to privilege escalation within the system."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Security 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "advanced-cluster-security/rhacs-main-rhel8", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:advanced_cluster_security:4"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-19278", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512524", "name": "RHBZ#2512524", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-08-07T09:41:42.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-625", "description": "Permissive Regular Expression", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-625: Permissive Regular Expression", "workarounds": [{"lang": "en", "value": "Administrators should review and update their Auth Machine-to-Machine (M2M) role mappings in StackRox/RHACS Central to ensure that `valueExpression` regular expressions are properly anchored (e.g., by adding `^` and `$` delimiters). This ensures exact matching of claim values and prevents unintended role assignments. Reloading the configuration or restarting the Central service may be required for changes to take effect."}], "timeline": [{"lang": "en", "time": "2026-08-07T09:41:42.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-08-07T09:41:42.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Sergey Kanibor (r0binak) for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-08-10T12:13:40.169Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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