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GHSA-gv94-wp4h-vv8p

Keycloak has Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-0707

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-parent <= 26.5.0 no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.