DEBIAN-CVE-2026-42257
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
DEBIAN-CVE-2026-42257
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-2026-42257
ruby3.1
Source reference: /affected/0/package/name
- Affected versions
- 3.1.2-7
Source reference:
/affected/0/versions3.1.2-7+deb12u1Source reference:
/affected/0/versions3.1.2-7+hurd.1Source reference:
/affected/0/versions3.1.2-8Source reference:
/affected/0/versions3.1.2-8.1~exp1Source reference:
/affected/0/versions3.1.2-8.3Source reference:
/affected/0/versions3.1.2-8.4Source reference:
/affected/0/versions3.1.2-8.5Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby3.3
Source reference: /affected/1/package/name
- Affected versions
- 3.3.8-2
Source reference:
/affected/1/versions3.3.8-2.1Source reference:
/affected/1/versions3.3.8-2.2Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby3.3
Source reference: /affected/2/package/name
- Affected versions
- 3.3.8-2
Source reference:
/affected/2/versions3.3.8-2.1Source reference:
/affected/2/versions3.3.8-2.2Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- 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"
}
]
}
],
"package": {
"name": "ruby3.1",
"purl": "pkg:deb/debian/ruby3.1?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.1.2-7",
"3.1.2-7+deb12u1",
"3.1.2-7+hurd.1",
"3.1.2-8",
"3.1.2-8.1~exp1",
"3.1.2-8.3",
"3.1.2-8.4",
"3.1.2-8.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42257.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby3.3",
"purl": "pkg:deb/debian/ruby3.3?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.3.8-2",
"3.3.8-2.1",
"3.3.8-2.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42257.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby3.3",
"purl": "pkg:deb/debian/ruby3.3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.3.8-2",
"3.3.8-2.1",
"3.3.8-2.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42257.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57635 · Revision 1
- Added to Heist Feed
- Publisher date