Juspay Hyperswitch before 1.128.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge payment status updates because the Worldpayxml connector's verify_webhook_source always returns true without enforced mTLS. Attackers knowing the merchant_id and Worldpay orderCode can POST unsigned XML with lastEvent SETTLED to the worldpayxml webhook endpoint, marking unpaid payments as charged or triggering refund, dispute and payout events.
https://github.com/juspay/hyperswitch/releases/tag/v1.128.0
https://github.com/juspay/hyperswitch/commit/e797b36a1af204f4e4820c4938c6e4b10e9ae4fa
https://github.com/juspay/hyperswitch/commit/681cf96bbc888239daf669a71b0554e934210ee3
https://github.com/juspay/hyperswitch
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-113802
https://abraxaslabs.tech/research/hyperswitch-unsigned-webhook
Published: 2026-10-30
Updated: 2026-10-30
Base Score: 5.4
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity: Medium
Base Score: 8.2
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Severity: High
EPSS: 0.00237