CVE-2026-13676 fast-uri vulnerable to host confusion via failed IDN canonicalization

fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode IDN hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize and equal still return...

pwnzilla.txt

/ SSSSSSS, SSSSSSS' PwnZilla 5 - One sploit fits all. FireFox optimized iSY iS; .sS Exploit for IDN host name heap buffer overrun in .SSSSSSS .sS Mozilla browsers FireFox, Mozilla and Netscape iS; .sS Copyright C 2003-2005 by Berend-Jan Wever. .SS sSSSSSSP Official release:...