PHP's security team rated two undisclosed vulnerabilities 9.2 on the CVSS v4.0 scale. watchTowr researchers say both allow remote code execution, and only the four supported branches can get the fix.
The PHP security team published workaround advice for a new remote code execution flaw that has no patch, and said the earlier PHP2Shell bugs are already being probed in the wild.
Bojan Zdrnja walks through the published proofs of concept and finds heavy preconditions, including a small memory limit and a single-worker setup, that real servers rarely match.
A JSON array sent as the api_token let unauthenticated attackers log in as existing users on Laravel apps backed by MySQL or MariaDB, and a working proof-of-concept is public.
The PHP security team said it would ship emergency updates for two vulnerabilities rated 9.2 under CVSS v4.0, after details reportedly leaked ahead of the planned disclosure.
PHP says fixes for the two critical-severity bugs, publicly dubbed PHP2Shell, are planned for Wednesday, 21 October 2026 at 14:00 UTC, and urges users to prepare to upgrade immediately.