Stack-based buffer overflow in Squid - #VU149502
Published: September 14, 2026
Vulnerability identifier: #VU149502
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform an out-of-bounds write.
The vulnerability exists due to a stack-based buffer overflow in HTTP authentication when forwarding traffic to a cache_peer configured to use client-provided Basic authentication credentials. A remote user can provide Basic authentication credentials to perform an out-of-bounds write.
Affected software
Squid
Remediation
Install security update from vendor's website.
Squid - update to 7.7