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2 vulnerabilities found for hydra by cardano-scaling

CVE-2026-62162 (GCVE-0-2026-62162)
Vulnerability from cvelistv5
Published
2026-10-30 18:30
Modified
2026-10-30 22:17
Severity ?
8.2 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
Summary
Hydra is a layer-two scalability solution for Cardano. Prior to 2.1.0, the `Claim` branch in `hydra-plutus/validators/deposit.ak` checks only that `datum.head_id` matches the attacker-controlled `redeemer.currencySymbol` and that the transaction is valid before the deposit deadline. It neither requires spending the Head state-token UTxO in the same transaction nor constrains outputs. After a deposit made through `POST /commit` is confirmed, any third party able to build a Cardano transaction can observe and consume the pending deposit UTxO before its deadline and redirect the assets to an arbitrary address. A standalone deposit spend invokes no Head validator, bypassing its safety checks; historical head-ID binding and the Aiken rewrite retained this missing invariant. The default deadline is three times depositPeriod, so the described attack applies to pending deposits before that deadline. This issue is fixed in version 2.1.0.
References
Impacted products
Vendor Product Version
cardano-scaling hydra Version: < 2.1.0
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CVE-2025-48886 (GCVE-0-2025-48886)
Vulnerability from cvelistv5
Published
2025-06-19 14:24
Modified
2025-06-23 17:36
Severity ?
4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
CWE
  • CWE-755 - Improper Handling of Exceptional Conditions
Summary
Hydra is a layer-two scalability solution for Cardano. Prior to version 0.22.0, the process assumes L1 event finality and does not consider failed transactions. Currently, Cardano L1 is monitored for certain events which are necessary for state progression. At the moment, Hydra considers those events as finalized as soon as they are recognized by the node participants making such transactions the target of re-org attacks. The system does not currently consider the fact that failed transactions on the Cardano L1 can indeed appear in blocks because these transactions are so infrequent. This issue has been patched in version 0.22.0.
References
Impacted products
Vendor Product Version
cardano-scaling hydra Version: < 0.22.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

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