CVE-2026-119037

HighCVSS 7.5/10Last modified Nov 6, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-347

Affected software

Vendor	Product	Versions
—	—	< 1.01

References

https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes

Timeline

Published: Oct 30, 2026
Last modified: Nov 6, 2026
NVD status: Deferred

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