Vulnerability in Cardano-Scaling Hydra
CVE-2025-48886
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.
EPSS: 0.003 (16.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Cardano-scaling Hydra — versions < 0.22.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-48886?
- CVE-2025-48886 is a medium-severity vulnerability in Cardano-Scaling Hydra, classified under Improper Handling of Exceptional Conditions. CVSS score: 4.8/10. Published 2025-06-19.
- How severe is CVE-2025-48886?
- Medium severity. CVSS v3 base score is 4.8 out of 10.