vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2020-36843

MEDIUM
4.3
CVSS Score
Published: March 13, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 03:16 AM UTC
1 product affected across 1 vendorEd25519-java

Using ed25519-java by str4d?

Get instant alerts when new vulnerabilities affect ed25519-java - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM4.3
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ed25519-java· STR4D
60%
v ≤ 0.3.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMmitre
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-347

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card