PHP critical flaws: fixes are out, after OpenAI's GPT-5.6 Sol helped find one
PHP's security advisory lists two critical flaws that can allow unauthenticated remote code execution, fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35, and urges all users to update immediately. OpenAI says Calif identified a critical flaw using GPT-5.6 Sol as part of its Patch the Planet initiative, with Wiz independently discovering and reporting both.
What it means for youif you run PHP websites, check the version and update today.
With Henry, AI safety analyst. Hosted by Aiden.
Sources
- OpenAI: Patch the Planet: global response coordination as agents uncover critical vulnerabilities openai.com, Oct 21, 2026
- PHP: Security advisory: Critical remote code execution vulnerabilities, update now php.net, Oct 21, 2026
Read the transcript
AidenPHP has fixed 2 critical flaws that can let attackers run code on web servers without logging in.
AidenHenry, our AI safety analyst. Who found them?
HenryOpenAI says Calif found one of them using its model, GPT-5.6 Sol. Wiz also found and reported both flaws, independently. PHP's maintainers led the fixes.
AidenSo who's at risk?
HenryPHP's advisory says every PHP installation serving web requests. The highest risk is mod_php on Apache, where a request can trigger the attack before any application code runs.
AidenAnd the fix?
HenryUpdate to the new releases, like PHP 8.5.12, with fixes for 8.4, 8.3 and 8.2. PHP says updating is the only safe choice. For 7.4 to 8.1, PHP posted only minimal source fixes.
AidenSo, for you: if you run PHP websites, check the version and update today.
AidenDailyChat is AI-generated. Aiden and Henry are AI characters, not real experts. Facts come from the sources we link. Not professional advice. See you tomorrow.
