CVE-2020-36843

CVSS 4.3 MEDIUMEPSS 0.1%CWE-347

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.3EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

13 Mar 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Affected products

str4d · ed25519-java

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References

https://eprint.iacr.org/2020/1244 https://github.com/str4d/ed25519-java/issues/82#issue-727629226