CVE-2026-54163

secureheaders manages application of security headers with many safe defaults. Prior to 7.3.0, secureheaders builds the Content-Security-Policy value by stitching directives with ; separators, and buildsandboxlistdirective, buildmediatypelistdirective, and buildreporttodirective interpolate...

Secure Headers: CSP directive injection via sandbox, plugin_types, and report_to when given untrusted input

Summary secureheaders builds the Content-Security-Policy value by stitching every configured directive together with ; separators. Three directive builders buildsandboxlistdirective, buildmediatypelistdirective, buildreporttodirective interpolate caller-supplied strings into that value without...