---
id: "CVE-2026-128024"
page: "https://infrastack.ai/live/CVE-2026-128024"
kind: "vulnerability"
aliases: ["CVE-2026-128024"]
title: "FrankenPHP: crafted JSON arrays crash the server process and every request"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["frankenphp", "kubernetes", "php", "runtime", "self-hosted"]
not_affected_if: ["fixed-version", "no-worker-mode"]
published_at: "2026-11-13T10:18:08+00:00"
first_seen_at: "2026-11-13T10:47:31+00:00"
updated_at: "2026-11-13T10:51:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-128024", "first_seen_at": "2026-11-13T10:47:31+00:00"}]
exploit_sources: []
---

# FrankenPHP: crafted JSON arrays crash the server process and every request

Link for people: https://infrastack.ai/live/CVE-2026-128024 (this .md is for agents)

FrankenPHP before 1.13.0 has a denial-of-service flaw in its goArray() conversion, where arrays with null integer-keyed elements cause an unrecovered cgo panic. A remote attacker who sends crafted JSON passed to frankenphp_log() or returned from worker callbacks can abort the whole server process, dropping every vhost and in-flight request.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the FrankenPHP version with `frankenphp version` or the binary used in your image; versions below `1.13.0` are in range.
- Look for applications that call `frankenphp_log()` or return arrays from FrankenPHP worker callbacks using decoded JSON from request input.

## Fix

- FrankenPHP: upgrade to `1.13.0` or later.

## Timeline

- 2026-11-13T10:47:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-128024

## Documents

- [advisory] Vendor advisory: github.com https://github.com/php/frankenphp/security/advisories/GHSA-4prg-hv4r-g6mv
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/frankenphp-before-1.13.0-denial-of-service-via-goarray-nil-type-assertion

## From the sources

FrankenPHP before 1.13.0 contains a denial of service vulnerability in goArray() that allows remote attackers to abort the server process via arrays with null integer-keyed elements. Attackers can send crafted JSON passed to frankenphp_log() or returned from worker callbacks, triggering an unrecovered cgo panic that terminates every vhost and in-flight request.

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