CVE catalog

CVE-2026-47729

Severity: Critical · CVSS 9.2
Published: Mar 24, 2026, 11:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.50% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	squid	sid	`7.7-1`	fixed
Debian	squid	forky	`7.7-1`	fixed
Debian	squid	trixie	`6.13-2+deb13u3`	fixed
Debian	squid	trixie-security	`6.13-2+deb13u2`	fixed
Debian	squid	bookworm	`5.7-2+deb12u5`	vulnerable
Debian	squid	bookworm-security	`5.7-2+deb12u6`	fixed
Cpe	squid	Not reported	Not reported	vulnerable
Ubuntu	squid	noble	`6.14-0ubuntu0.24.04.5`	fixed
Ubuntu	squid-cgi	noble	`6.14-0ubuntu0.24.04.5`	fixed
Ubuntu	squid-common	noble	`6.14-0ubuntu0.24.04.5`	fixed
Ubuntu	squid-openssl	noble	`6.14-0ubuntu0.24.04.5`	fixed
Ubuntu	squid-purge	noble	`6.14-0ubuntu0.24.04.5`	fixed
Ubuntu	squidclient	noble	`6.14-0ubuntu0.24.04.5`	fixed
Alpine	squid	3.23	`7.6-r0`	fixed
Alpine	squid	3.24	`7.6-r0`	fixed
Ubuntu	squid3	pro	`3.5.23-5ubuntu1`	vulnerable
Ubuntu	squid3	pro	`3.5.23-5ubuntu2`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.1`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.2`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.3`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.4`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.5`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.6`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.7`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.8`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.9`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.10`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.11`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.12`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.13`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm1`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm2`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm3`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm4`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm5`	vulnerable
Ubuntu	squid3	pro	`3.5.27-1ubuntu1.14+esm6`	fixed
Ubuntu	squid	pro	`4.8-1ubuntu2`	vulnerable
Ubuntu	squid	pro	`4.8-1ubuntu3`	vulnerable
Ubuntu	squid	pro	`4.9-2ubuntu1`	vulnerable
Ubuntu	squid	pro	`4.9-2ubuntu2`	vulnerable
Ubuntu	squid	pro	`4.9-2ubuntu3`	vulnerable
Ubuntu	squid	pro	`4.9-2ubuntu4`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.1`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.2`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.3`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.4`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.5`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.6`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.7`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.8`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.9`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.10`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.11`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.12`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.13`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.13+esm1`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.13+esm2`	vulnerable
Ubuntu	squid	pro	`4.10-1ubuntu1.13+esm3`	fixed
Ubuntu	squid	22.04	`4.13-10ubuntu5`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu1`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu3`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu4`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu4.1`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu4.2`	vulnerable
Ubuntu	squid	22.04	`5.2-1ubuntu4.3`	vulnerable
Ubuntu	squid	22.04	`5.7-0ubuntu0.22.04.1`	vulnerable
Ubuntu	squid	22.04	`5.7-0ubuntu0.22.04.2`	vulnerable
Ubuntu	squid	22.04	`5.7-0ubuntu0.22.04.3`	vulnerable
Ubuntu	squid	22.04	`5.7-0ubuntu0.22.04.4`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.1`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.2`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.3`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.4`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.5`	vulnerable
Ubuntu	squid	22.04	`5.9-0ubuntu0.22.04.7`	fixed
Ubuntu	squid	24.04	`6.1-2ubuntu1`	vulnerable
Ubuntu	squid	24.04	`6.1-2ubuntu2`	vulnerable
Ubuntu	squid	24.04	`6.5-1ubuntu1`	vulnerable
Ubuntu	squid	24.04	`6.5-1ubuntu2`	vulnerable
Ubuntu	squid	24.04	`6.5-1ubuntu3`	vulnerable
Ubuntu	squid	24.04	`6.6-1ubuntu4`	vulnerable
Ubuntu	squid	24.04	`6.6-1ubuntu5`	vulnerable
Ubuntu	squid	24.04	`6.6-1ubuntu5.1`	vulnerable
Ubuntu	squid	24.04	`6.10-0ubuntu0.24.04.1`	vulnerable
Ubuntu	squid	24.04	`6.13-0ubuntu0.24.04.1`	vulnerable
Ubuntu	squid	24.04	`6.13-0ubuntu0.24.04.2`	vulnerable
Ubuntu	squid	24.04	`6.13-0ubuntu0.24.04.3`	vulnerable
Ubuntu	squid	24.04	`6.14-0ubuntu0.24.04.1`	vulnerable
Ubuntu	squid	24.04	`6.14-0ubuntu0.24.04.2`	vulnerable
Ubuntu	squid	24.04	`6.14-0ubuntu0.24.04.4`	fixed
Ubuntu	squid	25.10	`6.13-1ubuntu1`	vulnerable
Ubuntu	squid	25.10	`6.13-1ubuntu2`	vulnerable
Ubuntu	squid	25.10	`6.13-1ubuntu3`	vulnerable
Ubuntu	squid	25.10	`6.13-1ubuntu4`	vulnerable
Ubuntu	squid	25.10	`6.13-1ubuntu4.1`	vulnerable
Ubuntu	squid	25.10	`6.14-0ubuntu0.25.10.1`	vulnerable
Ubuntu	squid	25.10	`6.14-0ubuntu0.25.10.2`	vulnerable
Ubuntu	squid	25.10	`6.14-0ubuntu0.25.10.4`	fixed
Ubuntu	squid	26.04	`6.13-1ubuntu4`	vulnerable
Ubuntu	squid	26.04	`6.13-1ubuntu5`	vulnerable
Ubuntu	squid	26.04	`7.2-2ubuntu1`	vulnerable
Ubuntu	squid	26.04	`7.2-2ubuntu2`	vulnerable
Ubuntu	squid	26.04	`7.2-2ubuntu2.2`	fixed
Cpe	squid	Not reported	`7.6`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	squid	source	sid	`7.6-1`	not yet assigned	Not reported	Not reported
Debian	squid	source	forky	`7.6-1`	not yet assigned	Not reported	Not reported
Debian	squid	source	trixie	`6.13-2+deb13u2`	not yet assigned	Not reported	Not reported
Debian	squid	source	bookworm	`5.7-2+deb12u6`	not yet assigned	Not reported	Not reported
Ubuntu	squid	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	squid-cgi	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	squid-common	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	squid-openssl	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	squid-purge	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	squidclient	deb	noble	`6.14-0ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Alpine	squid	apk	3.23	`7.6-r0`	Not reported	ALPINE-CVE-2026-47729	Not reported
Alpine	squid	apk	3.24	`7.6-r0`	Not reported	ALPINE-CVE-2026-47729	Not reported
Ubuntu	squid3	deb	pro	`3.5.27-1ubuntu1.14+esm6`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Ubuntu	squid	deb	pro	`4.10-1ubuntu1.13+esm3`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Ubuntu	squid	deb	22.04	`5.9-0ubuntu0.22.04.7`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Ubuntu	squid	deb	24.04	`6.14-0ubuntu0.24.04.4`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Ubuntu	squid	deb	25.10	`6.14-0ubuntu0.25.10.4`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Ubuntu	squid	deb	26.04	`7.2-2ubuntu2.2`	Not reported	UBUNTU-CVE-2026-47729	Not reported
Cpe	squid	cpe	Not reported	`7.6`	Not reported	NVD-CVE-2026-47729	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[squid]Affected
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · arm64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
[squid-cgi]Affected
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · arm64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
[squidclient]Affected
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · arm64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
[squid-common]Affected
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · all · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · all · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · all · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · all · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
[squid-openssl]Affected
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · arm64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
[squid-purge]Affected
Source package: [squid]
Details (4)
- 5.7-2+deb12u5 · amd64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u5 · arm64 · bookworm
  Affected · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · amd64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12
- 5.7-2+deb12u6 · arm64 · bookworm-security
  Fixed · Fixed: 5.7-2+deb12u6
  nvd · squid · debian · bookworm; nvd · squid · debian · 12

[Debian 13 (Trixie)]

[squid]Fixed
Details (4)
- 6.13-2+deb13u2 · amd64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
[squid-cgi]Fixed
Source package: [squid]
Details (4)
- 6.13-2+deb13u2 · amd64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
[squidclient]Fixed
Source package: [squid]
Details (4)
- 6.13-2+deb13u2 · amd64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
[squid-common]Fixed
Source package: [squid]
Details (4)
- 6.13-2+deb13u2 · all · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · all · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · all · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · all · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
[squid-openssl]Fixed
Source package: [squid]
Details (4)
- 6.13-2+deb13u2 · amd64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
[squid-purge]Fixed
Source package: [squid]
Details (4)
- 6.13-2+deb13u2 · amd64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · amd64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13
- 6.13-2+deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 6.13-2+deb13u2
  nvd · squid · debian · 13

Observed: Oct 27, 2026, 8:03:05 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]