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Advisory record · GHSA-p53j-g8pw-4w5f

Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check

CVSS 4.3 MediumEPSS 0.0014 · 3rd percentile

Published by the GitHub Advisory Database at 13 Mar 2025, 06:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
net.i2p.crypto:eddsaMaven<=0.3.0No fixed version yet
net.i2p:i2pMaven<0.9.390.9.39
Identifiers
GHSA-p53j-g8pw-4w5f · CVE-2020-36843
Weakness (CWE)
CWE-347
Tags
Published
13 Mar 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

net.i2p.crypto:eddsa through version 0.3.0 accepts malleable Ed25519 signatures and does not meet the SUF-CMA property. An attacker can create new valid signatures for a known message that differ from the original. No fixed version of net.i2p.crypto:eddsa is listed; net.i2p:i2p versions before 0.9.39 are also affected, so upgrade it to 0.9.39.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.3 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CNA (mitre)
  • CISA KEV Not listed.
  • EPSS 0.0014, the 3rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:18 UTC First seen by agentprime
  2. 31 Oct 2026, 14:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.