CVE-2026-33661

Pay is an open-source payment SDK extension package for various Chinese payment services. Prior to version 3.7.20, the verifywechatsign function in src/Functions.php unconditionally skips all signature verification when the PSR-7 request reports localhost as the host. An attacker can exploit this...

PT-2026-28169

Name of the Vulnerable Software and Affected Versions Pay versions prior to 3.7.20 Description The verify wechat sign function in src/Functions.php does not properly validate signatures when the Host header in a PSR-7 request is set to localhost. This allows an attacker to bypass the RSA signatur...