Vulnerability Description
Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature. A webhook body with a top-level "payload" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length. A remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-119036?
CVE-2026-119036 is a documented vulnerability. Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature. A webhook body with a top-level "payload" key is veri...
How severe is CVE-2026-119036?
CVSS scoring is not yet available for CVE-2026-119036. Check NVD for updates.
Is there a patch for CVE-2026-119036?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.