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.
Fix
Public exploits 3
- monzaviman/CVE-2025-62168 PoC on GitHub
- nehkark/CVE-2025-62168 PoC on GitHub
- shahroodcert/CVE-2025-62168 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4443f Patch
- https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr Mitigation, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · squid-cacheNVD modified 2026-10-19 16:10
Affected (CPE criteria) 1
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*