July 25, 2026 Headless Browser RCE, Part 3: Defeating Full RELRO in wkhtmltopdf's WebKit Turning a 2011 JavaScriptCore use-after-free into a single self-contained HTML file that reaches code execution in wkhtmltopdf's WebKit 534.34 across Linux (Partial and Full RELRO, three glibc versions) and native macOS, under ASLR.