Vulnerability · Published Oct 30, 2026 · Assigned by VulnCheck

CVE-2026-119421Hyperswitch through 1.128.0 Missing Authorization in Payout Confirmation

Medium 5.9

In plain English

A medium-severity authorization bypass via user-controlled key in hyperswitch from juspay. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.3%top 72.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
juspay	hyperswitch	0 – through 1.128.00 – before 2026.10.19.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

https://github.com/juspay/hyperswitch/commit/f1144ec5c7e38b3b048fe797fad57e743041f345 patch
https://github.com/juspay/hyperswitch/commit/607b15fcc4b7dae71c2aafb8c004eea333ac6fd8 patch
https://github.com/juspay/hyperswitch/blob/v1.128.0/crates/router/src/services/authentication.rs#L5921-L5927 technical-description
https://github.com/juspay/hyperswitch/blob/2026.09.21.0/crates/router/src/core/payouts/helpers.rs#L1465 technical-description
https://abraxaslabs.tech/research/hyperswitch-payout-confirm-secret third-party-advisory
https://github.com/juspay/hyperswitch product
VulnCheck Advisory: Hyperswitch through 1.128.0 Missing Authorization in Payout Confirmation third-party-advisory