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CVE-2026-4342

ingress-nginx comment-based nginx configuration injection

Published: Mar 19, 2026Updated: May 19, 2026 Sources: CVE List NVD BDUCWE-20
8.8HIGH
NVD MITRE
EPSS Score
1.5%
Top 29.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-20NVD-CWE-noinfo

Affected Products

Kubernetes
oss-project·USaka k8s
ingress-nginx
Cloud & SaaS
nginx ingress controllerOn-premNetwork Device
Networking Infrastructure / load-balancer-proxy
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
The Kubernetes Authors
oss-projectaka kubernetes
ingress-nginxMixed
Cloud & SaaS / container-orchestration

Exploitability

Official Patch Available
Scannable·OpenVAS
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/kubernetes/kubernetes/issues/137893
github.com
http://www.openwall.com/lists/oss-security/2026/03/19/9
openwall.com
https://github.com/stuartMoorhouse/CVE-2026-4342
github.com
and 2 more references View all →
News mentions
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