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...

CVE-2026-33661 WeChat Pay callback signature verification bypassed when Host header is localhost

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...

GHSA-Q938-GHWV-8GVC WeChat Pay callback signature verification bypassed when Host header is localhost

Summary 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 by sending a crafted HTTP request to the WeChat Pay callback endpoint with a Host: localhost header,...

The vulnerability of the auth_svc function in the Caldera automated system for emulating hacker actions allows a hacker to increase their privileges.

The vulnerability of the authsvc function in the Caldera Calibur emulation system is related to errors in processing the “localhost” string in the HTTP header of the host. Exploiting this vulnerability can allow a remote attacker to increase their privileges...