CVE-2024-42459: In the Elliptic package 6.5.6 for Node.js, EDDSA signature malleability occurs because there is a missing sign

Q: How do I fix CVE-2024-42459?

elliptic: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-42459 being exploited?

CVE-2024-42459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-42459 affect?

CVE-2024-42459 affects elliptic. Severity is medium (CVSS 5.3). In the Elliptic package 6.5.6 for Node.js, EDDSA signature malleability occurs because there is a missing signature length check, and thus zero-valued bytes can be removed or appended.

Q: How urgent is CVE-2024-42459?

Priority 34/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2024-42459 is a medium-severity flaw (CVSS 5.3) affecting elliptic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Elliptic package 6.5.6 for Node.js, EDDSA signature malleability occurs because there is a missing signature length check, and thus zero-valued bytes can be removed or appended.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-347
Published	2024-08-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: indutny

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-02 07:16 UTCPublished CVE record published
2026-06-17 07:49 UTCUpdated Record last modified

indutny elliptic DOWNGRADE

Affected: 6.5.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.5.6

1. Check installed version

npm ls elliptic

2. No fixed release: DOWNGRADE to a release before 6.5.6

npm view elliptic versions npm install elliptic@"<6.5.6"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-42459?

elliptic: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-42459 being exploited?

CVE-2024-42459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-42459 affect?

CVE-2024-42459 affects elliptic. Severity is medium (CVSS 5.3). In the Elliptic package 6.5.6 for Node.js, EDDSA signature malleability occurs because there is a missing signature length check, and thus zero-valued bytes can be removed or appended.

How urgent is CVE-2024-42459?

Priority 34/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2024-48949 CRITICAL 9.1 UPGRADE The verify function in lib/elliptic/eddsa/index.js in the Elliptic package before 6.5.6 for Node.js omits "sig
CVE-2024-48948 MEDIUM 4.8 DOWNGRADE The Elliptic package 6.5.7 for Node.js, in its for ECDSA implementation, does not correctly verify valid signa
CVE-2024-42461 CRITICAL 9.1 DOWNGRADE In the Elliptic package 6.5.6 for Node.js, ECDSA signature malleability occurs because BER-encoded signatures
CVE-2024-42460 MEDIUM 5.3 DOWNGRADE In the Elliptic package 6.5.6 for Node.js, ECDSA signature malleability occurs because there is a missing chec

References

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