HighFix available
nginx — security advisory
A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Products
- nginx
- Affected versions
- 1.22.1-9, 1.22.1-9+deb12u1, 1.22.1-9+deb12u2, 1.22.1-9+deb12u3, 1.22.1-9+deb12u4, 1.22.1-9+deb12u5, 1.22.1-9+deb12u6, 1.22.1-9+deb12u7, 1.26.3-3, 1.26.3-3+deb13u1, 1.26.3-3+deb13u2, 1.26.3-3+deb13u3, 1.26.3-3+deb13u4, 1.26.3-3+deb13u5, 1.28.0-1, 1.28.0-2, 1.28.0-3, 1.28.0-4, 1.28.0-5, 1.28.0-6, 1.28.1-1, 1.28.1-2, 1.28.1-3, 1.28.2-1, 1.28.2-2, 1.28.2-3, 1.28.2-4, 1.28.3-1, 1.28.3-2, 1.30.0-1, 1.30.0-2, 1.30.0-3
- Fixed versions
- 1.22.1-9+deb12u8, 1.26.3-3+deb13u6, 1.30.0-4
- CVEs
- CVE-2026-42946
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:38 UTC · Revision 2
Source evidence
A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
osv:DEBIAN-CVE-2026-42946
nginx
Fixed versions: 1.22.1-9+deb12u8
nginx
Fixed versions: 1.26.3-3+deb13u6
nginx
Fixed versions: 1.30.0-4
Complete source record
{
"id": "b751cc38f2d74f40a738bb68104a61c3cdaa1b1a15e38213b8d1bccbb857b0b5",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-42946",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-42946",
"summary": "A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
"evidence": "osv:DEBIAN-CVE-2026-42946",
"products": [
{
"name": {
"value": "nginx",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.22.1-9+deb12u8",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1.22.1-9",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u6",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1-9+deb12u7",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "nginx",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.26.3-3+deb13u6",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1.26.3-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.26.3-3+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1.26.3-3+deb13u2",
"evidence": "/affected/1/versions"
},
{
"value": "1.26.3-3+deb13u3",
"evidence": "/affected/1/versions"
},
{
"value": "1.26.3-3+deb13u4",
"evidence": "/affected/1/versions"
},
{
"value": "1.26.3-3+deb13u5",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "nginx",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.30.0-4",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.26.3-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-5",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.0-6",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.1-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.1-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.2-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.2-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.28.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.30.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.30.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.30.0-3",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-42946",
"aliases": [
"DEBIAN-CVE-2026-42946"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.22.1-9+deb12u8"
}
]
}
],
"package": {
"name": "nginx",
"purl": "pkg:deb/debian/nginx?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.22.1-9",
"1.22.1-9+deb12u1",
"1.22.1-9+deb12u2",
"1.22.1-9+deb12u3",
"1.22.1-9+deb12u4",
"1.22.1-9+deb12u5",
"1.22.1-9+deb12u6",
"1.22.1-9+deb12u7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42946.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.26.3-3+deb13u6"
}
]
}
],
"package": {
"name": "nginx",
"purl": "pkg:deb/debian/nginx?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.26.3-3",
"1.26.3-3+deb13u1",
"1.26.3-3+deb13u2",
"1.26.3-3+deb13u3",
"1.26.3-3+deb13u4",
"1.26.3-3+deb13u5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42946.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.30.0-4"
}
]
}
],
"package": {
"name": "nginx",
"purl": "pkg:deb/debian/nginx?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.26.3-3",
"1.28.0-1",
"1.28.0-2",
"1.28.0-3",
"1.28.0-4",
"1.28.0-5",
"1.28.0-6",
"1.28.1-1",
"1.28.1-2",
"1.28.1-3",
"1.28.2-1",
"1.28.2-2",
"1.28.2-3",
"1.28.2-4",
"1.28.3-1",
"1.28.3-2",
"1.30.0-1",
"1.30.0-2",
"1.30.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42946.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:29.295052071Z",
"provider": "osv",
"upstream": [
"CVE-2026-42946"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-42946"
]
},
"related_cves": [
{
"value": "CVE-2026-42946",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460946,
"published_at": "2026-05-13T16:16:50.34+00:00"
}