CVE-2024-42460Public exploitNetwork attack vector

Signature malleability via noncanonical DER integers

Published Aug 2, 2024 · Updated Nov 3, 2025

ECDSA signature malleability in Elliptic 2.0.0 through 6.5.6 allows remote attackers to submit noncanonical signatures. The DER decoder in lib/elliptic/ec/signature.js accepts r or s integers whose high bit is set without the required leading zero byte. Reachability depends on a consuming application verifying attacker-controlled ECDSA signatures, and the demonstrated consequence is acceptance of an alternate encoding rather than signature forgery.

CVSS severity5.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ECDSA signature malleability in Elliptic 2.0.0 through 6.5.6 allows remote attackers to submit noncanonical signatures. The DER decoder in lib/elliptic/ec/signature.js accepts r or s integers whose high bit is set without the required leading zero byte. Reachability depends on a consuming application verifying attacker-controlled ECDSA signatures, and the demonstrated consequence is acceptance of an alternate encoding rather than signature forgery.

The record

CVE
CVE-2024-42460
Published
Aug 2, 2024
Updated
Nov 3, 2025
Vendor
Elliptic Project
Product
Elliptic
Classifications
CWE-130
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elliptic Project · Ellipticversion=6.5.6

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-130Improper Handling of Length Parameter Inconsistency

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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