MediumFix available
squid — security advisory
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.
- Products
- squid
- Affected versions
- 5.7-2, 5.7-2+deb12u1, 5.7-2+deb12u2, 5.7-2+deb12u3, 5.7-2+deb12u4, 5.7-2+deb12u5, 6.13-2, 6.13-2+deb13u1, 7.1-1, 7.2-1, 7.2-2, 7.4-1, 7.5-1
- Fixed versions
- 5.7-2+deb12u6, 6.13-2+deb13u2, 7.6-1
- CVEs
- CVE-2026-47729
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:52 UTC · Revision 2
Source evidence
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.
osv:DEBIAN-CVE-2026-47729
squid
Fixed versions: 5.7-2+deb12u6
squid
Fixed versions: 6.13-2+deb13u2
squid
Fixed versions: 7.6-1
Complete source record
{
"id": "4d8bc481642c379cf24c4eb8bd5cdf71fcb06bde8ec7073c1163c8af3b600e34",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-47729",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-47729",
"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 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.",
"evidence": "osv:DEBIAN-CVE-2026-47729",
"products": [
{
"name": {
"value": "squid",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.7-2+deb12u6",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "5.7-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.7-2+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "5.7-2+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "5.7-2+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "5.7-2+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "5.7-2+deb12u5",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "squid",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.13-2+deb13u2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "6.13-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.13-2+deb13u1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "squid",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.6-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "6.13-2",
"evidence": "/affected/2/versions"
},
{
"value": "7.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "7.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.5-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-47729",
"aliases": [
"DEBIAN-CVE-2026-47729"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.7-2+deb12u6"
}
]
}
],
"package": {
"name": "squid",
"purl": "pkg:deb/debian/squid?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.7-2",
"5.7-2+deb12u1",
"5.7-2+deb12u2",
"5.7-2+deb12u3",
"5.7-2+deb12u4",
"5.7-2+deb12u5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47729.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.13-2+deb13u2"
}
]
}
],
"package": {
"name": "squid",
"purl": "pkg:deb/debian/squid?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.13-2",
"6.13-2+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47729.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.6-1"
}
]
}
],
"package": {
"name": "squid",
"purl": "pkg:deb/debian/squid?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.13-2",
"7.1-1",
"7.2-1",
"7.2-2",
"7.4-1",
"7.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47729.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-25T09:47:30.643964253Z",
"provider": "osv",
"upstream": [
"CVE-2026-47729"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-47729"
]
},
"related_cves": [
{
"value": "CVE-2026-47729",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 445131,
"published_at": "2026-07-16T17:16:57.217+00:00"
}