# CVE-2026-115937: Craft Commerce Mollie webhook parameter validation bypass

Source: https://junglewise.ai/threats/cve-2026-115937-the-mollie-webhook-endpoint-accepts-two-independent-attacker  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-23. Updated: 2026-10-23  
License: CC BY 4.0 with a link back

CVE-2026-115937 · Severity: high · CVSS 7.5 · Published 2026-10-23

Craft Commerce's Mollie payment gateway plugin fails to verify that webhook payment IDs and transaction hashes belong together. An attacker with any valid paid Mollie payment ID from the merchant can pair it with an arbitrary transaction hash to trick the system into marking any transaction as successfully paid, potentially completing payments for lower amounts than intended or allowing unauthorized refunds.

Vendors: [Craft](https://junglewise.ai/threats/vendors/craft).

## Quick answers

**Is CVE-2026-115937 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-115937 being exploited in the wild.

**How severe is CVE-2026-115937?** High severity, with a CVSS score of 7.5, published 23 October 2026.

**Which products and versions are affected?** Craft Commerce Mollie.

**Is there a fix for CVE-2026-115937?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-115937 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-115937?** Check whether you run Craft Commerce Mollie. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The webhook endpoint accepts two independent, attacker-controlled parameters (commerceTransactionHash and id for the Mollie payment) without cryptographic verification that they correspond to each other. An unauthenticated attacker can provide any paid Mollie payment ID combined with any transaction hash; the vulnerable code then queries Mollie's API with the attacker-supplied payment ID, sees a "paid" status, and marks the targeted transaction as successful without validating the hash matches that payment.

## Affected products

- Craft Commerce Mollie

## Timeline

- 2026-10-23: disclosed

## References

- [https://packagist.org/](https://packagist.org/)
- [https://github.com/craftcms/commerce-mollie](https://github.com/craftcms/commerce-mollie)