PT-2025-11144 · Unknown+1 · Eddsa-Java+1

Huitseeker + 2 · Published 2020-10-09 · Updated 2026-06-01 · CVE-2020-36843

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: EdDSA-Java (aka ed25519-java) versions 0.3.0 and earlier

Description: The implementation of EdDSA in EdDSA-Java exhibits signature malleability and does not satisfy the SUF-CMA property. This allows attackers to create new valid signatures different from previous signatures for a known message.

Recommendations: For EdDSA-Java versions 0.3.0 and earlier, consider updating to a version that addresses the signature malleability issue to prevent attackers from creating new valid signatures. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

AZL-73250

BDU:2026-01711

CVE-2020-36843

ECHO-4633-35AE-FCC7

GHSA-P53J-G8PW-4W5F

OESA-2025-1334

OPENSUSE-SU-2025:14892-1

OPENSUSE-SU-2025_1029-1

OPENSUSE-SU-2026:10919-1

SUSE-SU-2025:1029-1

SUSE-SU-2025_1029-1

Affected Products

Eddsa-Java

Suse

References · 27

• https://nvd.nist.gov/vuln/detail/CVE-2020-36843 · Security Note
• https://osv.dev/vulnerability/GHSA-p53j-g8pw-4w5f · Vendor Advisory
• https://osv.dev/vulnerability/AZL-73250 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1334 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-36843 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1029-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-36843 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-36843 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-36843 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:14892-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-36843 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-36843 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01711 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10919-1 · Vendor Advisory
• https://github.com/i2p/i2p.i2p/commit/d7d1dcb5399c61cf2916ccc45aa25b0209c88712#diff-658f7b1aa34b58d27796fccdb8b756c72702d64ae44703374960f1cb89a5a5c3 · Note