DEBIAN-CVE-2026-32762
Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwarded_values parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons, a header can be interpreted by Rack as multiple Forwarded directives rather than as a single quoted for value. In deployments where an upstream proxy, WAF, or intermediary validates or preserves quoted Forwarded values differently, this discrepancy can allow an attacker to smuggle host, proto, for, or by parameters through a single header value. This issue has been patched in versions 3.1.21 and 3.2.6.
DEBIAN-CVE-2026-32762
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-2026-32762
ruby-rack
Source reference: /affected/0/package/name
- Affected versions
- 3.1.16-0.1
Source reference:
/affected/0/versions3.1.18-1Source reference:
/affected/0/versions3.1.18-1~deb13u1Source reference:
/affected/0/versions3.1.20-0+deb13u1Source reference:
/affected/0/versions - Fixed versions
- 3.1.20-0+deb13u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
ruby-rack
Source reference: /affected/1/package/name
- Affected versions
- 3.1.16-0.1
Source reference:
/affected/1/versions3.1.18-1Source reference:
/affected/1/versions3.1.18-1~deb13u1Source reference:
/affected/1/versions3.2.4-1Source reference:
/affected/1/versions3.2.5-1Source reference:
/affected/1/versions3.2.5-2Source reference:
/affected/1/versions3.2.6-1Source reference:
/affected/1/versions - Fixed versions
- 3.2.6-2
Source reference:
/affected/1/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": "3.1.20-0+deb13u2"
}
]
}
],
"package": {
"name": "ruby-rack",
"purl": "pkg:deb/debian/ruby-rack?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.1.16-0.1",
"3.1.18-1",
"3.1.18-1~deb13u1",
"3.1.20-0+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32762.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.2.6-2"
}
]
}
],
"package": {
"name": "ruby-rack",
"purl": "pkg:deb/debian/ruby-rack?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.1.16-0.1",
"3.1.18-1",
"3.1.18-1~deb13u1",
"3.2.4-1",
"3.2.5-1",
"3.2.5-2",
"3.2.6-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32762.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57511 · Revision 1
- Added to Heist Feed
- Publisher date