{"action":"Upgrade yansongda/pay to 3.7.20 or later.","affected":[{"fixed":"3.7.20","introduced":"0"}],"component":"yansongda/pay","cve_ids":["CVE-2026-33661"],"ecosystem":"Packagist","epss":0.00522,"exploited":false,"fixed_versions":["3.7.20"],"ghsa_id":"GHSA-q938-ghwv-8gvc","id":"tcs_01M5KF74E6J3AA7CMQ494W5SP8","modified_at":"2026-03-27T22:17:43.058715Z","published_at":"2026-03-25T19:30:09Z","references":["https://osv.dev/vulnerability/GHSA-q938-ghwv-8gvc","https://github.com/yansongda/pay/security/advisories/GHSA-q938-ghwv-8gvc","https://nvd.nist.gov/vuln/detail/CVE-2026-33661","https://github.com/yansongda/pay/commit/26987ebf789f1e7f0a85febb640986ab4289fd7f","https://github.com/yansongda/pay","https://github.com/yansongda/pay/releases/tag/v3.7.20"],"severity":{"label":"high","score":8.6},"sources":[{"source":"osv","source_id":"GHSA-q938-ghwv-8gvc","url":"https://osv.dev/vulnerability/GHSA-q938-ghwv-8gvc"}],"summary":"WeChat Pay callback signature verification bypassed when Host header is localhost"}