What’s Vulnerable › Vulnerabilities

CVE-2024-22192: Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-16 · updated 2026-06-17
• Weakness: CWE-327

Description

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

• hyperledger-archives ursa: 0.1.0

References

• https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g
• https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g

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