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elliptic 6.0.0 vulnerabilities, and what to upgrade to

elliptic 6.0.0 has 9 known vulnerabilities (2 rated high or critical); 6.6.1 fixes 8 of them, and 1 has no fixed version yet. 6.6.1 has 1 known vulnerability of its own, and so does every newer release we checked.

npm (opens in a new tab) describes it as “EC cryptography”

Known vulnerabilities
9
2 rated high or critical
Released
Oct 28, 2015
Latest is 6.6.1
Downloads last week
131
Under 1% of elliptic downloads
Licence
MIT
OpenSSF Scorecard
1.6/10
indutny/elliptic (opens in a new tab)
Pulls in
5 packages
Resolved by deps.dev

What to upgrade to

Every newer release we checked still has known vulnerabilities. The fewer, the better.

  • 6.6.1

    Fixes 8 of the 9 known vulnerabilities and the newest 6.x release and the latest release. Released Nov 13, 2024.

    1 known vulnerability, worst rated warning

Hand the fix to your coding agent

One task with the upgrade, the file to change and why. Paste it into Claude Code, Cursor or Codex.

Findings

Every advisory for elliptic 6.0.0

Known exploited first (CISA KEV), then by how likely they are to be exploited (FIRST EPSS), then by severity. Each id links to its OSV.dev record.

  1. CriticalCVE-2020-13822 on OSV.dev (opens in a new tab)GHSA-vh7m-p724-62c2EPSS: top 15%

    Signature Malleabillity in elliptic

    Fixed in 6.5.3. Published Jul 29, 2020.

  2. WarningCVE-2020-28498 on OSV.dev (opens in a new tab)GHSA-r9p9-mrjm-926wEPSS: top 33%

    Elliptic Uses a Broken or Risky Cryptographic Algorithm

    Fixed in 6.5.4. Published Mar 8, 2021.

  3. LowCVE-2024-42461 on OSV.dev (opens in a new tab)GHSA-49q7-c7j4-3p7mEPSS: top 52%

    Elliptic allows BER-encoded signatures

    Fixed in 6.5.7. Published Aug 2, 2024.

  4. LowCVE-2024-48948 on OSV.dev (opens in a new tab)GHSA-fc9h-whq2-v747EPSS: top 56%

    Valid ECDSA signatures erroneously rejected in Elliptic

    Fixed in 6.6.0. Published Oct 15, 2024.

  5. LowCVE-2024-48949 on OSV.dev (opens in a new tab)GHSA-434g-2637-qmqrEPSS: top 59%

    Elliptic's verify function omits uniqueness validation

    Fixed in 6.5.6. Published Oct 10, 2024.

  6. LowCVE-2024-42460 on OSV.dev (opens in a new tab)GHSA-977x-g7h5-7qgwEPSS: top 62%

    Elliptic's ECDSA missing check for whether leading bit of r and s is zero

    Fixed in 6.5.7. Published Aug 2, 2024.

  7. LowCVE-2024-42459 on OSV.dev (opens in a new tab)GHSA-f7q4-pwc6-w24pEPSS: top 79%

    Elliptic's EDDSA missing signature length check

    Fixed in 6.5.7. Published Aug 2, 2024.

  8. LowCVE-2025-14505 on OSV.dev (opens in a new tab)GHSA-848j-6mx2-7j84EPSS: top 93%

    Elliptic Uses a Cryptographic Primitive with a Risky Implementation

    No fixed version listed yet. Published Jan 8, 2026.

  9. CriticalGHSA-vjh7-7g9h-fjfh on OSV.dev (opens in a new tab)

    Elliptic's private key extraction in ECDSA upon signing a malformed input (e.g. a string)

    Fixed in 6.6.1. Published Feb 12, 2025.

Who is still on a vulnerable elliptic

100% of last week’s 14.5M elliptic downloads went to versions with known vulnerabilities.

From npm’s per-version download counts for the last 7 days, each version checked against OSV.dev. The versions checked cover over 99% of downloads.

Is elliptic the only one?

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Check your whole repo

How this page is checked

StackPrism asks OSV.dev which advisories affect exactly elliptic 6.0.0, merges duplicates filed under several ids, and ranks them with CISA’s Known Exploited Vulnerabilities list and FIRST EPSS. Release dates and deprecation come from deps.dev and npm. No AI writes this page: every sentence comes from that data, refreshed every few hours.

Last checked against npm, OSV.dev, deps.dev, CISA KEV and FIRST EPSS.