CVE-2024-48949: Elliptic's verify function omits uniqueness validation

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-10 · updated 2026-06-17
Weakness: CWE-347

Description

The verify function in lib/elliptic/eddsa/index.js in the Elliptic package before 6.5.6 for Node.js omits "sig.S().gte(sig.eddsa.curve.n) || sig.S().isNeg()" validation.

Affected products

Elliptic: before 6.5.6 — fixed in 6.5.6
Npm Elliptic: before 6.5.6 — fixed in 6.5.6

How to fix

Upgrade to a fixed version: Elliptic 6.5.6; Npm Elliptic 6.5.6. Check the vendor advisory for mitigations.

References

https://blog.trailofbits.com/2025/11/18/we-found-cryptography-bugs-in-the-elliptic-library-using-wycheproof/
https://github.com/indutny/elliptic/commit/7ac5360118f74eb02da73bdf9f24fd0c72ff5281
https://github.com/indutny/elliptic/compare/v6.5.5...v6.5.6
https://security.netapp.com/advisory/ntap-20241227-0003/

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