VulnerabilityDeferred

CVE-2020-36843

This allows attackers to create new valid signatures different from previous signatures for a known message.

MEDIUM 4.3EPSS 0.14%

Does this matter?

Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 4.3 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS: 0.14% probability · 4th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-347
Source: cve@mitre.org

EPSS trend

EPSS 0.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.