GHSA-PW9P-JVRM-F7RM PHP Standard Library: HTTP/2 server-side missing content-length validation enables request smuggling

Impact Psl\H2\ServerConnection does not validate that the total bytes received in DATA frames match the content-length header declared in the HEADERS frame, in violation of RFC 9113 §8.1.1. A malicious client can: - Send more DATA bytes than declared, smuggling additional content past...