Security · October 29, 2026
Also published in Português (Brasil)
AI accelerates exploitation of PHP2Shell vulnerability
Cybersecurity teams and web administrators are racing to update PHP systems after the publication of several security flaws. Attackers began attempting to exploit these weaknesses within hours of the disclosure to breach internet-connected systems. The vulnerability, known as PHP2Shell, gained attention because artificial intelligence helped researchers find a practical method to exploit it. While the underlying issues had been known for years, they were previously considered too complex to be used directly in an attack. Cloudflare analysis detected millions of exploitation attempts within hours of the vulnerability information being published. This situation illustrates how AI has the potential to accelerate attacker efforts in exploiting software flaws. Despite the sharp increase in attack attempts, this does not necessarily mean a mass hacking event has occurred. The PHP Foundation stated that it has not found any successful exploitation. Several public examples of exploits were also deemed ineffective. Researchers at the security company Calif identified PHP2Shell and developed a way to exploit it in early August.
They used an AI model through the OpenAI program Patch the Planet, but the process still required human expertise to understand the code and ensure the weakness could be utilized. Some of the problems underlying this flaw were actually identified in 2024. At that time, researchers had not found a practical way to exploit it. The capability of AI helped open the path to utilizing a weakness that was previously difficult to turn into a real attack. Researchers at OpenAI and the security company Wiz also independently found related vulnerabilities. According to Wiz security researcher Sagi Tzadik, the PHP team had known about this weakness for years but had not addressed it because a practical exploitation method had not been found. AI developments make vulnerability analysis faster and increase pressure on developers and administrators with limited resources. Microsoft security updates in October 2026 recorded a record 1,453 vulnerabilities. Bank of America also recruited 1,000 consultants to fix weaknesses found by Anthropic's AI Mythos. However, AI does not completely change the basic principles of cybersecurity. The technology accelerates the search and analysis of weaknesses, but complex research still requires human expertise.
The widespread use of PHP on the internet also means this case may not represent the condition of all software. Jake Williams, Vice President of Research and Development at Hunter Strategy and a former NSA hacker, estimates that more old vulnerabilities will be rediscovered. However, he assesses that the number of flaws that are easy to find and exploit remains limited, especially because not all software has the same level of exposure as PHP. Ryan Austin, the Calif researcher who found the flaw, also emphasized that AI models are not yet able to find all bugs through simple commands. Security researcher Niels Provos also reminded the public not to panic immediately because the discovery of PHP2Shell still requires a highly skilled team. This case shows that AI can turn old weaknesses into a more real threat in a shorter time. For server managers and developers, the important steps are to check systems, install security updates, and address known flaws before attackers successfully exploit them.