CVE-2025-62168

Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.

Affected products

Alt Linux, Almalinux, Centos, Debian, Linuxmint, Red Hat, Red Os, Rocky Linux

Squid-cache Squid

< 7.2

Fix

Available

CVSS 3.1

10.0 CRITICAL

EPSS

62.9% (99th percentile)

Weakness

CWE-209, CWE-550

NVD status

Modified

Published

2025-10-17