CVE-2026-47729: Squid-Cache Squid

Medium severity, CVSS 6.5. EPSS: 2.4% chance of exploitation in the next 30 days.

Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB directory-listing formats is not followed by a filename, parsing was not restricted to the input buffer, so a trusted client accessing a misbehaving FTP server through Squid's gateway feature could read memory from random unrelated transactions. This issue is fixed in version 7.6.

Affected products

• Squid-Cache Squid: before 7.6 (fixed in 7.6)

Published 2026-07-16. Last modified 2026-07-20.