Is this vulnerability remotely exploitable from the public internet?

It is indirectly exploitable. An external attacker needs a path to influence or control Ingress definitions (for example, by compromising a developer account, CI/CD pipeline, or tenant with permissions to create Ingress objects). Once they can create or modify an Ingress, they can exploit the annotation to inject configuration.

What level of access does an attacker need to exploit this?

The attacker must be able to create or update Ingress resources in a namespace managed by the ingress-nginx controller. This typically requires Kubernetes API credentials with write access to Ingress objects, which may be held by application teams, automation systems, or compromised service accounts.

What is the safest general fix pattern for this class of bug?

The safest pattern is to treat all user-controlled configuration metadata as untrusted input and strictly validate it against a minimal, well-defined grammar before using it in privileged configuration generation. That includes enforcing tight constraints on annotation values, robust escaping, and avoiding any mechanism that lets arbitrary strings be interpreted as configuration directives.

Severity:

HIGH RISK

(8.8)

Ingress Annotation Injection (CWE-20) in Kubernetes ingress-nginx rewrite-target

CVE-2026-3288

Published:

Mar 9, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-20

Impact:

Remote Code Execution and Secret Disclosure

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-20

Impact:

Remote Code Execution and Secret Disclosure

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Ingress Annotation Injection (CWE-20) in Kubernetes ingress-nginx rewrite-target

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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