{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0707", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-01-08T02:52:15.720Z", "datePublished": "2026-01-08T03:41:27.775Z", "dateUpdated": "2026-01-08T15:55:08.627Z"}, "containers": {"cna": {"title": "Keycloak: keycloak authorization header parsing leading to potential security control bypass", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the \"Bearer\" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Build of Keycloak", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhbk/keycloak-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:build_keycloak:"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-0707", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427768", "name": "RHBZ#2427768", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-01-07T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-551", "description": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization", "workarounds": [{"lang": "en", "value": "To mitigate this issue, configure any front-end security controls, such as Web Application Firewalls (WAFs) or reverse proxies, to strictly validate and normalize the `Authorization` header before forwarding requests to Keycloak. This ensures that only standard Bearer token formats are processed, preventing potential bypasses."}], "timeline": [{"lang": "en", "time": "2026-01-08T02:51:20.440000+00:00", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-01-07T00:00:00+00:00", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Guanping Zhang for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-01-08T03:41:27.775Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-08T15:54:59.827077Z", "id": "CVE-2026-0707", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-08T15:55:08.627Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0707", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-01-08T02:52:15.720Z", "datePublished": "2026-01-08T03:41:27.775Z", "dateUpdated": "2026-01-08T15:55:08.627Z"}, "containers": {"cna": {"title": "Keycloak: keycloak authorization header parsing leading to potential security control bypass", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the \"Bearer\" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Build of Keycloak", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhbk/keycloak-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:build_keycloak:"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-0707", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427768", "name": "RHBZ#2427768", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-01-07T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-551", "description": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization", "workarounds": [{"lang": "en", "value": "To mitigate this issue, configure any front-end security controls, such as Web Application Firewalls (WAFs) or reverse proxies, to strictly validate and normalize the `Authorization` header before forwarding requests to Keycloak. This ensures that only standard Bearer token formats are processed, preventing potential bypasses."}], "timeline": [{"lang": "en", "time": "2026-01-08T02:51:20.440000+00:00", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-01-07T00:00:00+00:00", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Guanping Zhang for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-01-08T03:41:27.775Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-0707", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-08T15:54:59.827077Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-08T15:55:04.859Z"}}]}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the \"Bearer\" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications."}], "id": "CVE-2026-0707", "lastModified": "2026-01-08T18:08:18.457", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Primary"}]}, "published": "2026-01-08T04:15:56.520", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-0707"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427768"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-551"}], "source": "secalert@redhat.com", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Guanping Zhang for reporting this issue.", "bugzilla": {"description": "keycloak: Keycloak Authorization Header Parsing Leading to Potential Security Control Bypass", "id": "2427768", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427768"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-551", "details": ["A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the \"Bearer\" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, configure any front-end security controls, such as Web Application Firewalls (WAFs) or reverse proxies, to strictly validate and normalize the `Authorization` header before forwarding requests to Keycloak. This ensures that only standard Bearer token formats are processed, preventing potential bypasses."}, "name": "CVE-2026-0707", "package_state": [{"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "rhbk/keycloak-rhel9", "product_name": "Red Hat Build of Keycloak"}], "public_date": "2026-01-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-0707\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-0707"], "statement": "This vulnerability is rated Moderate for Red Hat because Keycloak's excessive tolerance for non-standard Bearer token formats in the Authorization header can lead to inconsistencies with front-end security controls such as WAFs and proxies. This may enable potential bypass risks, allowing malformed tokens to circumvent intended security policies.", "threat_severity": "Moderate"}

{}