Description
The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.
Published: 2025-03-13
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-6277 The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.
Github GHSA Github GHSA GHSA-p53j-g8pw-4w5f Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check
History

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 9e-05}

epss

{'score': 0.00012}


Tue, 18 Mar 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 13 Mar 2025 05:45:00 +0000

Type Values Removed Values Added
Description The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-03-18T16:22:08.617Z

Reserved: 2025-03-13T00:00:00.000Z

Link: CVE-2020-36843

cve-icon Vulnrichment

Updated: 2025-03-18T16:22:04.608Z

cve-icon NVD

Status : Deferred

Published: 2025-03-13T06:15:34.043

Modified: 2026-04-15T00:35:42.020

Link: CVE-2020-36843

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses