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Advisories

Hyperswitch before 1.128.0 Webhook Authentication Bypass via Worldpayxml Connector

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Severity
high
Date
Affecting

  • hyperswitch >= 0, < 1.128.0

  • hyperswitch >= 0, < 2026.10.01.0

CWE
  • CWE-345 Insufficient Verification of Data Authenticity
CVSS
8.2
CVSS V4 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
Credit
Abraxas Labs, Nithin N
Description
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.

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