CVE-2025-62168: Squid <7.2 HTTP Auth Leakage via Error Handling
CVE-2025-62168 Published on October 17, 2025
Squid vulnerable to information disclosure via authentication credential leakage in error handling
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.
Vulnerability Analysis
CVE-2025-62168 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Types
Generation of Error Message Containing Sensitive Information
The software generates an error message that includes sensitive information about its environment, users, or associated data.
Server-generated Error Message Containing Sensitive Information
Certain conditions, such as network failure, will cause a server error message to be displayed. While error messages in and of themselves are not dangerous, per se, it is what an attacker can glean from them that might cause eventual problems.
Products Associated with CVE-2025-62168
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Affected Versions
squid-cache squid Version < 7.2 is affected by CVE-2025-62168Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.