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            "title": "Keycloak: keycloak authorization header parsing leading to potential security control bypass",
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                        "attackVector": "NETWORK",
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                        "confidentialityImpact": "NONE",
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                    "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."
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                    "url": "https://access.redhat.com/errata/RHSA-2026:3947",
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                            "cweId": "CWE-551",
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                    "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."
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                    "time": "2026-01-08T02:51:20.440Z",
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                    "lang": "en",
                    "value": "Red Hat would like to thank Guanping Zhang for reporting this issue."
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