Out-of-bounds Read in Squid-cache Squid

CVE-2026-47729

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…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-47729?
CVE-2026-47729 is a medium-severity vulnerability in Squid-cache Squid, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-07-16.
How severe is CVE-2026-47729?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-47729 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.