CVE-2026-119037: vulnerability in Business-GoCardless
Business::GoCardless versions before 1.01 for Perl accept forged webhooks when a configured webhook secret is undef or empty
Published
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3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
Business::GoCardless versions before 1.01 for Perl accept forged webhooks when a configured webhook secret is undef or empty.
signature_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.
A remote attacker can sign a forged webhook with an empty key and have it accepted as sent by GoCardless.
Affected products
Business-GoCardlessRelated CVEs — Business-GoCardless
In the same product, most dangerous first.
CVE-2026-119036—Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signatureEPSS 0.2%CVE-2026-119038—Business::GoCardless versions before 1.01 for Perl complete redirect flows without checking the session token, letting a leaked redirect flow ID create payments against another customer's mandateEPSS 0.2%