High
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
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42946
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 12:31 UTC · Revision 1
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:CVE-2026-42946
Complete source record
{
"id": "c42e7c7969eae60bb58549d71f88b2d5e1c1effc3f73303cae50cea7eff12754",
"url": "https://osv.dev/vulnerability/CVE-2026-42946",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "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:CVE-2026-42946",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-42946",
"aliases": [
"BIT-nginx-2026-42946",
"BIT-nginx-gateway-2026-42946",
"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": [
{
"repo": "https://github.com/nginx/nginx",
"type": "GIT",
"events": [
{
"introduced": "8a00db8fa12d871ecf067b2ea7fb8e9e71f0e3bf"
},
{
"last_affected": "955370fc8c12b1a945941f844adc9df49a0f3f32"
},
{
"introduced": "a2a09a84eb0a7059880500e70b40796ab1dd0c4d"
},
{
"last_affected": "6e14e954aaacce9a433d9b07b4653809c7594ab8"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0.8.42"
},
{
"last_affected": "0.9.7"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.0.0"
},
{
"last_affected": "1.30.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"release-1.30.0",
"release-1.29.8",
"release-1.29.7",
"release-1.29.6",
"release-1.29.5",
"release-1.29.4",
"release-1.29.3",
"release-1.29.2",
"release-1.29.1",
"release-1.29.0",
"release-1.27.5",
"release-1.27.4",
"release-1.27.3",
"release-1.27.2",
"release-1.27.1",
"release-1.27.0",
"release-1.25.5",
"release-1.25.4",
"release-1.25.3",
"release-1.25.2",
"release-1.25.1",
"release-1.25.0",
"release-1.23.4",
"release-1.23.3",
"release-1.23.2",
"release-1.23.1",
"release-1.23.0",
"release-1.21.6",
"release-1.21.5",
"release-1.21.4",
"release-1.21.3",
"release-1.21.2",
"release-1.21.1",
"release-1.21.0",
"release-1.19.10",
"release-1.19.9",
"release-1.19.8",
"release-1.19.7",
"release-1.19.6",
"release-1.19.5",
"release-1.19.4",
"release-1.19.3",
"release-1.19.2",
"release-1.19.1",
"release-1.19.0",
"release-1.17.10",
"release-1.17.9",
"release-1.17.8",
"release-1.17.7",
"release-1.17.6",
"release-1.17.5",
"release-1.17.4",
"release-1.17.3",
"release-1.17.2",
"release-1.17.1",
"release-1.17.0",
"release-1.15.12",
"release-1.15.11",
"release-1.15.10",
"release-1.15.9",
"release-1.15.8",
"release-1.15.7",
"release-1.15.6",
"release-1.15.5",
"release-1.15.4",
"release-1.15.3",
"release-1.15.2",
"release-1.15.1",
"release-1.15.0",
"release-1.13.12",
"release-1.13.11",
"release-1.13.10",
"release-1.13.9",
"release-1.13.8",
"release-1.13.7",
"release-1.13.6",
"release-1.13.5",
"release-1.13.4",
"release-1.13.3",
"release-1.13.2",
"release-1.13.1",
"release-1.13.0",
"release-1.11.13",
"release-1.11.12",
"release-1.11.11",
"release-1.11.10",
"release-1.11.9",
"release-1.11.8",
"release-1.11.7",
"release-1.11.6",
"release-1.11.5",
"release-1.11.4",
"release-1.11.3",
"release-1.11.2",
"release-1.11.1",
"release-1.11.0",
"release-1.9.15",
"release-1.9.14",
"release-1.9.13",
"release-1.9.12",
"release-1.9.11",
"release-1.9.10",
"release-1.9.9",
"release-1.9.8",
"release-1.9.7",
"release-1.9.6",
"release-1.9.5",
"release-1.9.4",
"release-1.9.3",
"release-1.9.2",
"release-1.9.1",
"release-1.9.0",
"release-1.7.12",
"release-1.7.11",
"release-1.7.10",
"release-1.7.9",
"release-1.7.8",
"release-1.7.7",
"release-1.7.6",
"release-1.7.5",
"release-1.7.4",
"release-1.7.3",
"release-1.7.2",
"release-1.7.1",
"release-1.7.0",
"release-1.5.13",
"release-1.5.12",
"release-1.5.11",
"release-1.5.10",
"release-1.5.9",
"release-1.5.8",
"release-1.5.7",
"release-1.5.6",
"release-1.5.5",
"release-1.5.4",
"release-1.5.3",
"release-1.5.2",
"release-1.5.1",
"release-1.5.0",
"release-1.4.0",
"release-1.3.16",
"release-1.3.15",
"release-1.3.14",
"release-1.3.13",
"release-1.3.12",
"release-1.3.11",
"release-1.3.10",
"release-1.3.9",
"release-1.3.8",
"release-1.3.7",
"release-1.3.6",
"release-1.3.5",
"release-1.3.4",
"release-1.3.3",
"release-1.3.2",
"release-1.3.1",
"release-1.3.0",
"release-1.2.0",
"release-1.1.19",
"release-1.1.18",
"release-1.1.17",
"release-1.1.16",
"release-1.1.15",
"release-1.1.14",
"release-1.1.13",
"release-1.1.12",
"release-1.1.11",
"release-1.1.10",
"release-1.1.9",
"release-1.1.8",
"release-1.1.7",
"release-1.1.6",
"release-1.1.5",
"release-1.1.4",
"release-1.1.3",
"release-1.1.2",
"release-1.1.1",
"release-1.1.0",
"release-1.0.5",
"release-1.0.4",
"release-1.0.3",
"release-1.0.2",
"release-1.0.1",
"release-1.0.0",
"release-0.9.7",
"release-0.9.6",
"release-0.9.5",
"release-0.9.4",
"release-0.9.3",
"release-0.9.2",
"release-0.9.1",
"release-0.9.0",
"release-0.8.53",
"release-0.8.52",
"release-0.8.51",
"release-0.8.50",
"release-0.8.49",
"release-0.8.48",
"release-0.8.47",
"release-0.8.46",
"release-0.8.45",
"release-0.8.44",
"release-0.8.43",
"release-0.8.42"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42946.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/nginx/nginx-gateway-fabric",
"type": "GIT",
"events": [
{
"introduced": "3a372747333fb1db372af7cf0b18ed7eef7c91f7"
},
{
"last_affected": "532db6a20b2912fe397211eef9f8d564d46a4bdd"
},
{
"introduced": "7dad8b31e3f0c3eadce36fed8c276e83e6583d24"
},
{
"last_affected": "95a66d8cec0ce98e1985aeab728317c5ba7ec0c6"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.3.0"
},
{
"last_affected": "1.6.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0"
},
{
"last_affected": "2.6.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42946.json"
}
}
],
"modified": "2026-10-28T02:30:28.553003620Z",
"provider": "osv",
"references": [
"https://my.f5.com/manage/s/article/K000161027"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*"
],
"vendor_product": "f5:dos",
"extracted_events": [
{
"range": [
{
"introduced": "4.3.0"
},
{
"last_affected": "4.7.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*"
],
"vendor_product": "f5:nginx_ingress_controller",
"extracted_events": [
{
"range": [
{
"introduced": "3.5.0"
},
{
"last_affected": "3.7.2"
},
{
"introduced": "4.0.0"
},
{
"last_affected": "4.0.1"
},
{
"introduced": "5.0.0"
},
{
"last_affected": "5.4.2"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*"
],
"vendor_product": "f5:nginx_instance_manager",
"extracted_events": [
{
"range": [
{
"introduced": "2.16.0"
},
{
"last_affected": "2.22.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*"
],
"vendor_product": "f5:nginx_plus",
"extracted_events": [
{
"range": [
{
"introduced": "r32"
},
{
"last_affected": "r36"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*"
],
"vendor_product": "f5:waf",
"extracted_events": [
{
"range": [
{
"introduced": "4.9.0"
},
{
"last_affected": "4.16.0"
},
{
"introduced": "5.1.0"
},
{
"last_affected": "5.8.0"
},
{
"introduced": "5.9.0"
},
{
"last_affected": "5.12.1"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:*"
],
"vendor_product": "f5:dos",
"extracted_events": [
{
"range": [
{
"introduced": "4.8.0"
},
{
"last_affected": "4.8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2026-42946",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 495406,
"published_at": "2026-05-13T16:16:50.34+00:00"
}