CVE-2026-33661

CVE-2026-33661 affects the yansongda/pay library prior to 3.7.20. The verify_wechat_sign() function incorrectly bypasses RSA signature verification when the PSR-7 request Host header is localhost, allowing an attacker to POST to the WeChat Pay callback with Host: localhost and forge payment succe...

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...