HighFix available
golang-1.19, golang-1.24 and 2 more products — security advisory
When an HTTP server handler sends a 2xx response to an HTTP/1 CONNECT request and returns without hijacking the connection, the server improperly continues to read and serve requests from the connection. Since a 2xx response to an HTTP/1 CONNECT converts the connection into a tunnel, the server should not treat the connection as continuing to contain HTTP. The impact of this misbehavior is mostly limited to potential request smuggling, where an intermediate proxy considers the data on the connection to be tunneled and the server considers it to be HTTP.
- Products
- golang-1.19, golang-1.24, golang-1.26, golang-1.27
- Affected versions
- 1.19.10-1, 1.19.10-2, 1.19.11-1, 1.19.12-1, 1.19.12-2, 1.19.12-2~bpo11+1, 1.19.12-2~bpo12+1, 1.19.13-1, 1.19.13-1~bpo11+1, 1.19.13-1~bpo12+1, 1.19.8-2, 1.19.9-1, 1.24.12-1, 1.24.13-1, 1.24.13-2, 1.24.4-1, 1.24.4-2, 1.24.4-3, 1.24.4-4, 1.24.7-1, 1.24.8-1, 1.24.9-1, 1.26.0-1, 1.26.1-1, 1.26.2-1, 1.26.2-2, 1.26.2-3, 1.26.3-1, 1.26.3-1~bpo13+1, 1.26.3-2, 1.26.3-2~bpo13+1, 1.26.4-1, 1.26.4-1~bpo13+1, 1.26.5-1, 1.26.5-1~bpo13+1, 1.26.6-1, 1.26.6-2, 1.26.7-1, 1.26.7-1~bpo13+1, 1.26.8-1, 1.26.8-1~bpo13+1, 1.26.8-2, 1.26~rc2-1, 1.26~rc3-1, 1.26~rc3-2, 1.27.0-1, 1.27.0-1~bpo13+1, 1.27.1-1, 1.27.1-2, 1.27.1-2~bpo13+1, 1.27~rc1-1, 1.27~rc2-1, 1.27~rc3-1
- Fixed versions
- 1.26.9-1, 1.27.2-1
- CVEs
- CVE-2026-94439
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 06:34 UTC · Revision 1
Source evidence
When an HTTP server handler sends a 2xx response to an HTTP/1 CONNECT request and returns without hijacking the connection, the server improperly continues to read and serve requests from the connection. Since a 2xx response to an HTTP/1 CONNECT converts the connection into a tunnel, the server should not treat the connection as continuing to contain HTTP. The impact of this misbehavior is mostly limited to potential request smuggling, where an intermediate proxy considers the data on the connection to be tunneled and the server considers it to be HTTP.
osv:DEBIAN-CVE-2026-94439
golang-1.19
Fixed versions: Not specified
golang-1.24
Fixed versions: Not specified
golang-1.26
Fixed versions: 1.26.9-1
golang-1.27
Fixed versions: 1.27.2-1
Complete source record
{
"id": "0935b38b4c51bc0e86430ac7d09aaf8c281d33c029943a6b4eff96bda148a37a",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-94439",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-94439",
"summary": "When an HTTP server handler sends a 2xx response to an HTTP/1 CONNECT request and returns without hijacking the connection, the server improperly continues to read and serve requests from the connection. Since a 2xx response to an HTTP/1 CONNECT converts the connection into a tunnel, the server should not treat the connection as continuing to contain HTTP. The impact of this misbehavior is mostly limited to potential request smuggling, where an intermediate proxy considers the data on the connection to be tunneled and the server considers it to be HTTP.",
"evidence": "osv:DEBIAN-CVE-2026-94439",
"products": [
{
"name": {
"value": "golang-1.19",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.19.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.11-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.12-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.12-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.12-2~bpo11+1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.12-2~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.13-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.13-1~bpo11+1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.13-1~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.8-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.9-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "golang-1.24",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.24.12-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.13-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.13-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.4-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.4-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.4-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.24.9-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "golang-1.26",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.26.9-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.26.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.2-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.3-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.3-2~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.4-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.5-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.6-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.7-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.8-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.8-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.26~rc2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26~rc3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26~rc3-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "golang-1.27",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.27.2-1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "1.27.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27.0-1~bpo13+1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27.1-2",
"evidence": "/affected/3/versions"
},
{
"value": "1.27.1-2~bpo13+1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27~rc1-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27~rc2-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.27~rc3-1",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-94439",
"aliases": [
"DEBIAN-CVE-2026-94439"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-1.19",
"purl": "pkg:deb/debian/golang-1.19?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.19.10-1",
"1.19.10-2",
"1.19.11-1",
"1.19.12-1",
"1.19.12-2",
"1.19.12-2~bpo11+1",
"1.19.12-2~bpo12+1",
"1.19.13-1",
"1.19.13-1~bpo11+1",
"1.19.13-1~bpo12+1",
"1.19.8-2",
"1.19.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94439.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-1.24",
"purl": "pkg:deb/debian/golang-1.24?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.24.12-1",
"1.24.13-1",
"1.24.13-2",
"1.24.4-1",
"1.24.4-2",
"1.24.4-3",
"1.24.4-4",
"1.24.7-1",
"1.24.8-1",
"1.24.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94439.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.26.9-1"
}
]
}
],
"package": {
"name": "golang-1.26",
"purl": "pkg:deb/debian/golang-1.26?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.26.0-1",
"1.26.1-1",
"1.26.2-1",
"1.26.2-2",
"1.26.2-3",
"1.26.3-1",
"1.26.3-1~bpo13+1",
"1.26.3-2",
"1.26.3-2~bpo13+1",
"1.26.4-1",
"1.26.4-1~bpo13+1",
"1.26.5-1",
"1.26.5-1~bpo13+1",
"1.26.6-1",
"1.26.6-2",
"1.26.7-1",
"1.26.7-1~bpo13+1",
"1.26.8-1",
"1.26.8-1~bpo13+1",
"1.26.8-2",
"1.26~rc2-1",
"1.26~rc3-1",
"1.26~rc3-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94439.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.27.2-1"
}
]
}
],
"package": {
"name": "golang-1.27",
"purl": "pkg:deb/debian/golang-1.27?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.27.0-1",
"1.27.0-1~bpo13+1",
"1.27.1-1",
"1.27.1-2",
"1.27.1-2~bpo13+1",
"1.27~rc1-1",
"1.27~rc2-1",
"1.27~rc3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94439.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-12T11:00:46.411170850Z",
"provider": "osv",
"upstream": [
"CVE-2026-94439"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-94439"
]
},
"related_cves": [
{
"value": "CVE-2026-94439",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 299785,
"published_at": "2026-10-08T23:17:04.76+00:00"
}