CVE-2025-4673

A flaw was found in net/http. Handling Proxy-Authorization and Proxy-Authenticate headers during cross-origin redirects allows these headers to be inadvertently forwarded, potentially exposing sensitive authentication credentials. This flaw allows a network-based attacker to manipulate redirect responses, unintentionally exposing authentication details to unauthorized parties.

The issue is rated as Moderate because while it can lead to a significant compromise of confidentiality, the attack complexity is high. Successful exploitation requires a specific set of circumstances, including the use of a proxy that relies on these headers for authentication and a user being enticed to interact with a malicious URL. The vulnerability does not allow for arbitrary code execution or a direct compromise of system integrity or availability.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.