PT-2026-133786

CVE-2026-62162

Published

2026-10-30

Updated

2026-10-30

Description by

CVSS 4.0

8.2

High

MetricsAV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Hydra versions prior to 2.1.0

Description A flaw exists in the Claim branch within hydra-plutus/validators/deposit.ak where the system only verifies that datum.head id matches the redeemer.currencySymbol and that the transaction occurs before the deposit deadline. The process fails to require spending the Head state-token UTxO in the same transaction and does not constrain outputs. Consequently, after a deposit is confirmed via the POST /commit endpoint, an external party can consume the pending deposit UTxO before the deadline and redirect assets to an arbitrary address. This occurs because a standalone deposit spend bypasses Head validator safety checks. The attack is applicable to pending deposits within the default deadline, which is three times the depositPeriod.

Recommendations Update to version 2.1.0.

Exploitability

Exploit

Fix

Impacts

Researchers

Noonio

Vendors

Affected products

Weakness enumeration

CWE-862: Missing Authorization

Related identifiers