DEBIAN-CVE-2026-50012
Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest reply handling (peerDigestSwapInMask in src/peer_digest.cc), Squid is vulnerable to a heap-based buffer overflow: a cache digest's on-the-wire size may be larger than the mask_size declared within the digest, so a trusted peer sending a maliciously crafted reply to a cache_digest request message can trigger the overflow. This attack is limited to Squid instances compiled with the --enable-cache-digests option and configured with cache_peer entries. This issue is fixed in version 7.6.
DEBIAN-CVE-2026-50012
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-50012
squid
Source reference: /affected/0/package/name
- Affected versions
- 5.7-2
Source reference:
/affected/0/versions5.7-2+deb12u1Source reference:
/affected/0/versions5.7-2+deb12u2Source reference:
/affected/0/versions5.7-2+deb12u3Source reference:
/affected/0/versions5.7-2+deb12u4Source reference:
/affected/0/versions5.7-2+deb12u5Source reference:
/affected/0/versions - Fixed versions
- 5.7-2+deb12u6
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
squid
Source reference: /affected/1/package/name
- Affected versions
- 6.13-2
Source reference:
/affected/1/versions6.13-2+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 6.13-2+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
squid
Source reference: /affected/2/package/name
- Affected versions
- 6.13-2
Source reference:
/affected/2/versions7.1-1Source reference:
/affected/2/versions7.2-1Source reference:
/affected/2/versions7.2-2Source reference:
/affected/2/versions7.4-1Source reference:
/affected/2/versions7.5-1Source reference:
/affected/2/versions - Fixed versions
- 7.6-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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-2026-50012.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-2026-50012.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-2026-50012.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57220 · Revision 1
- Added to Heist Feed
- Publisher date