How to Check if Your Website Is Affected by the PHP Vulnerability 2026

If you manage a website, you may be wondering how to check if your site is affected by the recent critical PHP vulnerabilities. OpenAI has released a tool that helps identify whether a server is exposing a potentially vulnerable PHP version, giving administrators a quick way to assess risk.

What the PHP Vulnerability Is and Why It Matters

Two critical vulnerabilities in PHP have prompted administrators and organizations worldwide to review servers and apply updates urgently. Some websites have even temporarily disconnected while fixes are applied or while they verify that their installation is protected.

PHP is a widely used scripting language that powers many websites, so a vulnerability can have widespread impact. Attackers could exploit these flaws to compromise servers, leading to data breaches or service disruptions.

How OpenAI's PHP Checker Works

OpenAI has published a small checker accompanied by two skills for Codex. The first, phpcheck-url, is designed for when you only have a website address. The second, phpcheck-server, is for when you have server access.

With a URL, the tool attempts to identify the PHP version that the server publicly exposes. With system access, it can directly check the installation and verify which version is actually serving the website.

Importantly, the tool does not launch exploitation requests; its function is to compare versions, not to prove whether a site has been compromised.

Step-by-Step: Using the Checker with Codex

To follow this method, open the ChatGPT desktop application and select Codex. The switch is made from the selector.

Once in Codex, you can use either skill depending on your access. If you only have the URL, use phpcheck-url. If you have server access, use phpcheck-server for a more accurate check. Context on how this played out before sits in How to Check if Your Website Is Affected by the PHP Vulnerability.

The tool will then attempt to determine the PHP version and compare it against known vulnerable versions. This gives you a quick indication of whether further action is needed. The background to this story is set out in PHP Vulnerability Triggers Global Website Shutdowns. A related thread runs through Technology: latest articles.

Key Takeaways

• OpenAI's checker helps identify if a website exposes a vulnerable PHP version.
• Two skills are available: phpcheck-url for URL-only checks and phpcheck-server for server access.
• The tool does not exploit vulnerabilities; it only compares versions.
• Use the ChatGPT desktop app and select Codex to access the skills.
• If a vulnerable version is detected, update PHP immediately or take the site offline until patched.

Comparison of the Two Skills

What to Do If Your Site Is Vulnerable

If the checker indicates that your site is running a vulnerable PHP version, you should update PHP to a patched version immediately. If you cannot update right away, consider taking the site offline temporarily to prevent exploitation. Earlier coverage in Critical PHP Flaw Puts Half the Internet at Risk Worldwide shows how the argument developed. A closer look at the same subject appears in Oppo Find X10 and Find X10 Pro Max: China's Mobile Photography Leap.

Also, review server logs for any suspicious activity and apply any additional security measures recommended by your hosting provider or security team. Anyone following the wider picture can start with New +400 Prefix Phone Scam Hits Spain: Fake Iberdrola Call. The same theme surfaces in MPs' Security Under Review After Attack on Helen Haines, which takes a different angle.

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