CVE-2024-22192: Hyperledger Ursa

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Ursa is a cryptographic library for use with blockchains. The revocation scheme that is part of the Ursa CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model. Notably, a malicious verifier may be able to generate a unique identifier for a holder providing a verifiable presentation that includes a Non-Revocation proof. The impact of the flaw is that a malicious verifier may be able to determine a unique identifier for a holder presenting a Non-Revocation proof. Ursa has moved to end-of-life status and no fix is expected.

Affected products

Published 2024-01-16. Last modified 2026-06-17.