GHSA-69fp-7c8p-crjr: Keycloak exposes sensitive information in Pushed Authorization Requests (PAR)

June 10, 2024

A flaw was found in Keycloak in the OAuth 2.0 Pushed Authorization Requests (PAR). Client provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server’s HTTP response to a request_uri authorization request. This could lead to an information disclosure vulnerability.

References

github.com/advisories/GHSA-69fp-7c8p-crjr
github.com/keycloak/keycloak
github.com/keycloak/keycloak/commit/2191cc26ae6deb52eeaf74046027b65804d16fd0
github.com/keycloak/keycloak/security/advisories/GHSA-69fp-7c8p-crjr

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