CVE-2026-40460

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting. 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 : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://my.f5.com/manage/s/article/K000161068	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_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 : 2026-06-29 14:17

NVD link : CVE-2026-40460

Mitre link : CVE-2026-40460

CVE.ORG link : CVE-2026-40460

JSON object : View

Products Affected

f5

nginx_open_source
nginx_ingress_controller
nginx_plus
waf
nginx_instance_manager
dos
nginx_gateway_fabric

CWE

CWE-290

Authentication Bypass by Spoofing

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"semver"}, {"status": "affected", "version": "1.26.0", "lessThan": "1.30.1", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-05-13T16:16:42.823", "references": [{"url": "https://my.f5.com/manage/s/article/K000161068", "tags": ["Vendor Advisory"], "source": "f5sirt@f5.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "f5sirt@f5.com", "description": [{"lang": "en", "value": "CWE-290"}]}], "descriptions": [{"lang": "en", "value": "When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC\u00a0module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}], "lastModified": "2026-06-29T14:17:01.230", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*", "vulnerable": true, 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