Vulnerabilities CVE-2026-0707 Detail Awaiting Analysis This CVE record has been marked for NVD enrichment efforts. Description 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. Metrics NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed. CVSS 4.0 Severity and Vector Strings: NIST: NVD N/A NVD assessment not yet provided. CVSS 3.x Severity and Vector Strings: CNA: Red Hat, Inc. Base Score: 5.3 MEDIUM Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS 2.0 Severity and Vector Strings: NIST: NVD Base Score: N/A NVD assessment not yet provided. References to Advisories, Solutions, and Tools By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected] . URL Source(s) Tag(s) https://access.redhat.com/security/cve/CVE-2026-0707 Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2427768 Red Hat, Inc. Weakness Enumeration CWE-ID CWE Name Source CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization Red Hat, Inc. Change History 1 change records found show changes New CVE Received from Red Hat, Inc. 1/07/2026 11:15:56 PM Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-551 Added Reference https://access.redhat.com/security/cve/CVE-2026-0707 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2427768 Quick Info CVE Dictionary Entry: CVE-2026-0707 NVD Published Date: 01/07/2026 NVD Last Modified: 01/08/2026 Source: Red Hat, Inc.