CVE-2026-42548 — Flight: Reflected XSS via unvalidated JSONP callback in Flight::jsonp()
Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Flight::jsonp() concatenates the ?jsonp= query parameter directly into an application/javascript response body …
Published: 2026-05-13 · CVSS: 8.6 · CVSS 4.0
Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Flight::jsonp() concatenates the ?jsonp= query parameter directly into an application/javascript response body without validating that the value is a legal JavaScript identifier. An attacker can inject arbitrary JavaScript that executes in the response origin, enabling reflected cross-site scripting. This vulnerability is fixed in 3.18.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7