DEBIAN-CVE-2026-50020
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, `HttpObjectDecoder` skips every byte for which `Character.isISOControl(b)` is `true` (0x00–0x1F and 0x7F) as well as all whitespace. RFC 9112 §2.2 only asks servers to ignore empty CRLF lines preceding the request-line — a carefully scoped robustness allowance intended to handle HTTP/1.0 POST workarounds. Silently absorbing NUL bytes, SOH, STX, and other non-CRLF control characters goes significantly beyond this, and can be exploited for request-boundary confusion in pipelined or multiplexed transports where a front-end component treats those bytes differently. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
DEBIAN-CVE-2026-50020
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-2026-50020
netty
Source reference: /affected/0/package/name
- Affected versions
- 1:4.1.48-10
Source reference:
/affected/0/versions1:4.1.48-11Source reference:
/affected/0/versions1:4.1.48-12Source reference:
/affected/0/versions1:4.1.48-13Source reference:
/affected/0/versions1:4.1.48-14Source reference:
/affected/0/versions1:4.1.48-15Source reference:
/affected/0/versions1:4.1.48-16Source reference:
/affected/0/versions1:4.1.48-7Source reference:
/affected/0/versions1:4.1.48-7+deb12u1Source reference:
/affected/0/versions1:4.1.48-7+deb12u2Source reference:
/affected/0/versions1:4.1.48-8Source reference:
/affected/0/versions1:4.1.48-9Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
netty
Source reference: /affected/1/package/name
- Affected versions
- 1:4.1.48-10
Source reference:
/affected/1/versions1:4.1.48-10+deb13u1Source reference:
/affected/1/versions1:4.1.48-11Source reference:
/affected/1/versions1:4.1.48-12Source reference:
/affected/1/versions1:4.1.48-13Source reference:
/affected/1/versions1:4.1.48-14Source reference:
/affected/1/versions1:4.1.48-15Source reference:
/affected/1/versions1:4.1.48-16Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
netty
Source reference: /affected/2/package/name
- Affected versions
- 1:4.1.48-10
Source reference:
/affected/2/versions1:4.1.48-11Source reference:
/affected/2/versions1:4.1.48-12Source reference:
/affected/2/versions1:4.1.48-13Source reference:
/affected/2/versions1:4.1.48-14Source reference:
/affected/2/versions1:4.1.48-15Source reference:
/affected/2/versions1:4.1.48-16Source 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": "netty",
"purl": "pkg:deb/debian/netty?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1:4.1.48-10",
"1:4.1.48-11",
"1:4.1.48-12",
"1:4.1.48-13",
"1:4.1.48-14",
"1:4.1.48-15",
"1:4.1.48-16",
"1:4.1.48-7",
"1:4.1.48-7+deb12u1",
"1:4.1.48-7+deb12u2",
"1:4.1.48-8",
"1:4.1.48-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50020.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netty",
"purl": "pkg:deb/debian/netty?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:4.1.48-10",
"1:4.1.48-10+deb13u1",
"1:4.1.48-11",
"1:4.1.48-12",
"1:4.1.48-13",
"1:4.1.48-14",
"1:4.1.48-15",
"1:4.1.48-16"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50020.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netty",
"purl": "pkg:deb/debian/netty?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:4.1.48-10",
"1:4.1.48-11",
"1:4.1.48-12",
"1:4.1.48-13",
"1:4.1.48-14",
"1:4.1.48-15",
"1:4.1.48-16"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50020.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57225 · Revision 1
- Added to Heist Feed
- Publisher date