DEBIAN-CVE-2026-40898
quic-go is an implementation of the QUIC protocol in Go. Prior to version 0.59.1, an attacker can cause excessive memory allocation in quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large trailer field section with many unique field names and/or large values. The implementation builds an `http.Header` for the corresponding `http.Request` or `http.Response`, while only enforcing limits on the size of the QPACK-compressed HEADERS frame, not on the decoded field section. This can lead to memory exhaustion. This is very similar to CVE-2025-64702. The difference is that this issue uses HTTP trailers, rather than HTTP headers, as the attack vector. A misbehaving or malicious peer can cause a denial-of-service (DoS) attack against quic-go's HTTP/3 servers or clients by triggering excessive memory allocation, potentially leading to crashes or resource exhaustion. This affects both servers and clients due to symmetric header construction. Version 0.59.1 enforces RFC 9114 decoded field section size limits for trailers as well. It incrementally decodes QPACK entries and checks the field section size after each entry, aborting the stream if an entry causes the limit to be exceeded.
DEBIAN-CVE-2026-40898
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-2026-40898
golang-github-lucas-clemente-quic-go
Source reference: /affected/0/package/name
- Affected versions
- 0.29.0-1
Source reference:
/affected/0/versions0.29.2-1Source reference:
/affected/0/versions0.29.2-2Source reference:
/affected/0/versions0.29.2-3Source reference:
/affected/0/versions0.37.0-1Source reference:
/affected/0/versions0.37.4-1Source reference:
/affected/0/versions0.37.4-1~bpo12+1Source reference:
/affected/0/versions0.38.2-1Source reference:
/affected/0/versions0.38.2-2Source reference:
/affected/0/versions0.46.0-1Source reference:
/affected/0/versions0.46.0-2Source reference:
/affected/0/versions0.46.0-2~bpo12+1Source reference:
/affected/0/versions0.50.0-1Source reference:
/affected/0/versions0.50.1-1Source reference:
/affected/0/versions0.50.1-2Source reference:
/affected/0/versions0.54.0-1Source reference:
/affected/0/versions0.54.0-2Source reference:
/affected/0/versions0.54.0-3Source reference:
/affected/0/versions0.54.1-1Source reference:
/affected/0/versions0.55.0-1Source reference:
/affected/0/versions0.59.0-1Source reference:
/affected/0/versions0.59.0-2Source reference:
/affected/0/versions0.59.0-2~bpo13+1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
golang-github-lucas-clemente-quic-go
Source reference: /affected/1/package/name
- Affected versions
- 0.50.1-2
Source reference:
/affected/1/versions0.54.0-1Source reference:
/affected/1/versions0.54.0-2Source reference:
/affected/1/versions0.54.0-3Source reference:
/affected/1/versions0.54.1-1Source reference:
/affected/1/versions0.55.0-1Source reference:
/affected/1/versions0.59.0-1Source reference:
/affected/1/versions0.59.0-2Source reference:
/affected/1/versions0.59.0-2~bpo13+1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
golang-github-lucas-clemente-quic-go
Source reference: /affected/2/package/name
- Affected versions
- 0.50.1-2
Source reference:
/affected/2/versions0.54.0-1Source reference:
/affected/2/versions0.54.0-2Source reference:
/affected/2/versions0.54.0-3Source reference:
/affected/2/versions0.54.1-1Source reference:
/affected/2/versions0.55.0-1Source reference:
/affected/2/versions0.59.0-1Source reference:
/affected/2/versions0.59.0-2Source reference:
/affected/2/versions0.59.0-2~bpo13+1Source 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": "golang-github-lucas-clemente-quic-go",
"purl": "pkg:deb/debian/golang-github-lucas-clemente-quic-go?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.29.0-1",
"0.29.2-1",
"0.29.2-2",
"0.29.2-3",
"0.37.0-1",
"0.37.4-1",
"0.37.4-1~bpo12+1",
"0.38.2-1",
"0.38.2-2",
"0.46.0-1",
"0.46.0-2",
"0.46.0-2~bpo12+1",
"0.50.0-1",
"0.50.1-1",
"0.50.1-2",
"0.54.0-1",
"0.54.0-2",
"0.54.0-3",
"0.54.1-1",
"0.55.0-1",
"0.59.0-1",
"0.59.0-2",
"0.59.0-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40898.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-lucas-clemente-quic-go",
"purl": "pkg:deb/debian/golang-github-lucas-clemente-quic-go?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.50.1-2",
"0.54.0-1",
"0.54.0-2",
"0.54.0-3",
"0.54.1-1",
"0.55.0-1",
"0.59.0-1",
"0.59.0-2",
"0.59.0-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40898.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-lucas-clemente-quic-go",
"purl": "pkg:deb/debian/golang-github-lucas-clemente-quic-go?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.50.1-2",
"0.54.0-1",
"0.54.0-2",
"0.54.0-3",
"0.54.1-1",
"0.55.0-1",
"0.59.0-1",
"0.59.0-2",
"0.59.0-2~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40898.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56912 · Revision 1
- Added to Heist Feed
- Publisher date