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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

63% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)

CWEs

CWE-209, CWE-550

Published

2025-10-17

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

Affected

• squid-cache:squid

References

• https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4443f
• https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr
• http://www.openwall.com/lists/oss-security/2025/11/05/6

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