CVE-2026-42946

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://my.f5.com/manage/s/article/K000161027	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:f5:dos::::::nginx::*
	cpe:2.3:a:f5:dos:4.8.0:::::nginx::
	cpe:2.3:a:f5:nginx_gateway_fabric::::::::
	cpe:2.3:a:f5:nginx_gateway_fabric::::::::
	cpe:2.3:a:f5:nginx_ingress_controller::::::::
	cpe:2.3:a:f5:nginx_ingress_controller::::::::
	cpe:2.3:a:f5:nginx_ingress_controller::::::::
	cpe:2.3:a:f5:nginx_instance_manager::::::::
	cpe:2.3:a:f5:nginx_open_source::::::::
	cpe:2.3:a:f5:nginx_open_source::::::::
	cpe:2.3:a:f5:nginx_plus::::::::
	cpe:2.3:a:f5:waf::::::nginx::*
	cpe:2.3:a:f5:waf::::::nginx::*
	cpe:2.3:a:f5:waf::::::nginx::*

History

No history.

Information

Published : 2026-05-13 16:16

Updated : 2026-06-18 14:12

NVD link : CVE-2026-42946

Mitre link : CVE-2026-42946

CVE.ORG link : CVE-2026-42946

JSON object : View

Products Affected

f5

nginx_open_source
nginx_ingress_controller
nginx_plus
waf
nginx_instance_manager
dos
nginx_gateway_fabric

CWE

CWE-789

Memory Allocation with Excessive Size Value

CWE-823

Use of Out-of-range Pointer Offset

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