In PHP versions 8.1.* before 8.1.31, 8.2.* before 8.2.26, 8.3.* before 8.3.14, when using streams with configured proxy and "request_fulluri" option, the URI is not properly sanitized which can lead to HTTP request smuggling and allow the attacker to use the proxy to perform arbitrary HTTP requests originating from the server, thus potentially gaining access to resources not normally available to the external user.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:4263 https://access.redhat.com/errata/RHSA-2025:4263
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:7315 https://access.redhat.com/errata/RHSA-2025:7315
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:7432 https://access.redhat.com/errata/RHSA-2025:7432