CVE-2026-47729: Squid is a caching proxy for the Web

Q: How do I fix CVE-2026-47729?

squid: upgrade to 7.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-47729 being exploited?

CVE-2026-47729 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-47729 affect?

CVE-2026-47729 affects squid. Severity is medium (CVSS 6.5). 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 t

Q: How urgent is CVE-2026-47729?

Priority 41/100. No elevated risk signals yet.

This month

MEDIUM 6.5UPGRADE

CVE-2026-47729 is a medium-severity flaw (CVSS 6.5) affecting squid. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-125, CWE-1289
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: squid-cache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 17:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

squid-cache squid UPGRADE

Affected: < 7.6

Fixed in: 7.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy squid || rpm -q squid || squid --version

2. UPGRADE to 7.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade squid

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade squid

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-47729?

squid: upgrade to 7.6. Exact commands for each OS are on this page.

Is CVE-2026-47729 being exploited?

CVE-2026-47729 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-47729 affect?

CVE-2026-47729 affects squid. Severity is medium (CVSS 6.5). 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 t

How urgent is CVE-2026-47729?

Priority 41/100. No elevated risk signals yet.

Software pages

Squid vulnerabilities

Related CVEs

CVE-2026-50012 MEDIUM 5.5 UPGRADE Squid is a caching proxy for the Web

References

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