6.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2026-24514

CVE-2026-24514: ingress-nginx vulnerable to Allocation of Resources Without Limits or Throttling

A security issue was discovered in ingress-nginx where the validating admission controller feature is subject to a denial of service condition. By sending large requests to the validating admission controller, an attacker can cause memory consumption, which may result in the ingress-nginx controller pod being killed or the node running out of memory.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2026-24514

CVE-2026-24514:

6.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
k8s.io/ingress-nginx	go	< 1.13.7	1.13.7
k8s.io/ingress-nginx	go	>= 1.14.0, < 1.14.3	1.14.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is a denial-of-service in the ingress-nginx admission controller caused by unbounded resource allocation. The analysis of the patches between the vulnerable version 1.13.6 and the patched version 1.13.7 revealed a key commit 8e910beffe7621a5c7edd31cdf319f66041df749 with the message "Admission Controller: Use 9 MB limit.". This commit modifies the internal/admission/controller/server.go file. Specifically, within the AdmissionControllerServer.ServeHTTP function, the code was changed from directly reading the entire request body with io.ReadAll(req.Body) to using an io.LimitReader. This change restricts the amount of data read from the request body, thus preventing the excessive memory allocation that caused the denial of service. The vulnerable function is therefore AdmissionControllerServer.ServeHTTP as it was responsible for processing the incoming request without proper limits.

Vulnerable functions

AdmissionControllerServer.ServeHTTP

internal/admission/controller/server.go

The function `ServeHTTP` in `AdmissionControllerServer` reads the entire request body into memory using `io.ReadAll` without any size limit. An attacker could send a request with a very large body, causing the server to allocate a large amount of memory, potentially leading to a denial of service.

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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