Arbitrary Code Execution Vulnerability in Ingress-Nginx by Kubernetes
CVE-2026-3288

8.8HIGH

Key Information:

Vendor

Kubernetes
Status
Ingress-nginx
Vendor
CVE Published:
9 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3288?

A security issue in ingress-nginx was identified where the annotation 'nginx.ingress.kubernetes.io/rewrite-target' can be exploited to inject malicious configuration into the nginx controller. This vulnerability may allow attackers to execute arbitrary code within the ingress-nginx controller’s context, potentially leading to unauthorized access to sensitive Secrets available to the controller. In default installations, the ingress-nginx controller has access to all Secrets cluster-wide, amplifying the risks when exploited.

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Deploy the Patch

Affected Version(s)

ingress-nginx 0

ingress-nginx 0 < 1.13.8

ingress-nginx 0 < 1.14.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3288
Created by SnailSploit

References

https://github.com/kubernetes/kubernetes/issues/137560

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kai Aizen
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