{"id":"CVE-2026-119037","title":"Business::GoCardless versions before 1.01 for Perl accept forged webhooks when a configured webhook secret is undef or empty","summary":"Business::GoCardless versions before 1.01 for Perl accept forged webhooks when a configured webhook secret is undef or empty.\n\nsignature_valid uses each configured secret as the HMAC key, and nothing rejects undef or an empty string, bot…","severity":"none","cwe":["CWE-347"],"product":"Business-GoCardless","affected":["Business-GoCardless < 1.01"],"published":"2026-10-30","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:56:27.922Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-119037","references":[{"url":"https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02077,"ingestedAt":"2026-11-05T16:07:30.224Z","slug":"CVE-2026-119037","body":"## Overview\n\nBusiness::GoCardless versions before 1.01 for Perl accept forged webhooks when a configured webhook secret is undef or empty.\n\nsignature_valid uses each configured secret as the HMAC key, and nothing rejects undef or an empty string, both of which Digest::SHA treats as an empty key. A secret read from an unset environment variable, or an empty entry in a list of rotated secrets, is used as is.\n\nA remote attacker can sign a forged webhook with an empty key and have it accepted as sent by GoCardless.\n\n## Affected\n\n- `Business-GoCardless < 1.01`\n\n## Remediation\n\nUpgrade to Business-GoCardless 1.01 or later.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}