The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability affects Firefox < 134 and Firefox ESR < 128.6.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:0080 https://access.redhat.com/errata/RHSA-2025:0080
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Via RHSA-2025:0133 https://access.redhat.com/errata/RHSA-2025:0133
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2025:0135 https://access.redhat.com/errata/RHSA-2025:0135
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat Enterprise Linux 8.4 Telecommunications Update Service Via RHSA-2025:0134 https://access.redhat.com/errata/RHSA-2025:0134
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2025:0132 https://access.redhat.com/errata/RHSA-2025:0132
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat Enterprise Linux 8.6 Telecommunications Update Service Via RHSA-2025:0136 https://access.redhat.com/errata/RHSA-2025:0136
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2025:0138 https://access.redhat.com/errata/RHSA-2025:0138
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2025:0137 https://access.redhat.com/errata/RHSA-2025:0137
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:0144 https://access.redhat.com/errata/RHSA-2025:0144
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2025:0162 https://access.redhat.com/errata/RHSA-2025:0162