---
id: CVE-2026-47729
title: Squid is a caching proxy for the Web
summary: >-
  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 i…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
  - CWE-1289
vendor: squid-cache
product: squid
affected:
  - squid < 7.6
patched:
  - squid 7.6
published: '2026-07-16'
updated: '2026-07-20'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47729'
references:
  - url: >-
      https://github.com/squid-cache/squid/commit/865a131c7d557e68c965043d98c2eccae26deef8
    label: security-advisories@github.com
  - url: 'https://github.com/squid-cache/squid/pull/2408'
    label: security-advisories@github.com
  - url: 'https://github.com/squid-cache/squid/pull/2409'
    label: security-advisories@github.com
  - url: 'https://github.com/squid-cache/squid/releases/tag/SQUID_7_6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg
    label: security-advisories@github.com
tags:
  - nvd
  - exploit-available
epss: 0.01503
epssPercentile: 0.73219
ingestedAt: '2026-07-20T02:36:03.241Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/0xBlackash/CVE-2026-47729'
  checkedAt: '2026-09-24T07:53:04.615Z'
exploitAvailable: true
---

## Overview

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

- `squid < 7.6`

## Remediation

Upgrade past the affected range:

- `squid 7.6`