CVE-2026-119421

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CVE-2026-119421

Summary: Hyperswitch through 1.128.0 Missing Authorization in Payout Confirmation

Details: Juspay Hyperswitch through 1.128.0 (and builds before 2026.10.19.0) contains a missing authorization vulnerability that allows unauthenticated attackers to confirm payouts with any client_secret via POST /payouts/{payout_id}/confirm. Attackers holding the merchant's publishable key and a payout_id can confirm payouts and overwrite amount, currency, connector, and routing fields to trigger unauthorized merchant payouts.

References: https://abraxaslabs.tech/research/hyperswitch-payout-confirm-secret, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119421.json, https://nvd.nist.gov/vuln/detail/CVE-2026-119421, https://www.vulncheck.com/advisories/hyperswitch-through-1.128.0-missing-authorization-in-payout-confirmation, https://github.com/juspay/hyperswitch/commit/607b15fcc4b7dae71c2aafb8c004eea333ac6fd8, https://github.com/juspay/hyperswitch/commit/f1144ec5c7e38b3b048fe797fad57e743041f345, https://github.com/juspay/hyperswitch, https://github.com/juspay/hyperswitch/blob/2026.09.21.0/crates/router/src/core/payouts/helpers.rs#L1465, https://github.com/juspay/hyperswitch/blob/v1.128.0/crates/router/src/services/authentication.rs#L5921-L5927