Max Matteo S.

Teamwork makes the dream work. The team and I @J4ck3LSyN @Archknight23 🚨 Heads-up for anyone running PHP: two critical RCE bugs, patch drops tomorrow. The PHP project has confirmed an emergency security release for two critical remote code execution vulnerabilities: CVE-2026-109618 and CVE-2026-109619, both rated CVSS v4.0 9.2. 📅 Patch lands Wednesday, Oct 21 at 14:00 UTC (9:00 AM Central). PHP has reserved the right to ship it earlier if details leak or exploitation shows up. PHP runs about 75% of the web, including WordPress, Drupal, Joomla, Laravel, Magento, and countless custom apps. If you operate a PHP server, this is your weekend-ruiner unless you act. Here's the part the big threat-intel shops aren't shouting about: No official technical details are public yet. But based on my own source-code analysis of php-src, my best assessment (moderate confidence, NOT officially confirmed) is that the vulnerable path is PHP's session.upload_progress / multipart form-data (rfc1867) handling: 🔹 Present since PHP 5.4 🔹 Enabled by default (the compiled-in default is On; the sample php.ini ships it commented out, so stock installs have it live) 🔹 Processes uploaded request data before any of your application code runs, so it's reachable pre-authentication on a default config That lines up exactly with the public breadcrumbs: "affects default installs," "every version since 5.x," "fires before user code." Treat it as a working hypothesis, not gospel. The official advisory supersedes all of this when it lands. ✅ What to do right now: 1. Inventory your PHP. Know every host and version (php -v). Anything on PHP 7.x or older won't get a fix, so plan to upgrade. 2. Apply the stopgap (best-intel, low-risk, reversible). In php.ini / .user.ini / .htaccess: session.upload_progress.enabled = Off Reload PHP-FPM or your web server. My analysis says this closes one of the two likely paths. 3. Clamp multipart uploads at the edge. The second likely path lives in the multipart parser itself, which runs for any multipart/form-data POST regardless of the setting above. If you've got a WAF or reverse proxy, tighten inspection or rate-limit multipart POSTs to endpoints that don't need uploads. This is the same network-layer mitigation the enterprise vendors are quietly deploying for their paying customers. 4. Patch the second it drops. Current stable: 8.5.11 / 8.4.26 / 8.3.35 / 8.2.34. If your hosting is managed, confirm your provider's timeline today. Why I'm posting this for free: A pre-patch mitigation shouldn't be a subscription perk. I'm a one man shop, and the orgs most likely to get burned in the gap between leak and patch are the small teams without an enterprise threat intel contract. The steps above cost nothing. Spend tonight reducing risk, not tomorrow doing incident response. I'll follow up once the official advisory publishes and confirm whether my root cause read was right. Stay patched. 🔒 #PHP #CyberSecurity #InfoSec #RCE #CVE #WordPress #Laravel #ThreatIntel #VulnerabilityManagement #AppSec