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TI-2021-19457 Aliases CVE-2021-43568GHSA-xx36-6rv4-gj8r

The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to…

Priority MEDIUM 44CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-347.

Summary

The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Why it matters now

EPSS 0.01055 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed ecdsa-elixir (Hex): 1.0.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—ecdsa-elixir (Hex)1.0.0 to before 1.0.11.0.1Patch availableGHSA-xx36-6rv4-gj8r
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • ecdsa-elixir (Hex) Vendor— Affected 1.0.0 to before 1.0.1 Fixed in 1.0.1 Patch available GHSA-xx36-6rv4-gj8r

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:starkbank:elixir_ecdsa:1.0.0:*:*:*:*:*:*:*1.0.0VulnerableStarkbank
  • cpe:2.3:a:starkbank:elixir_ecdsa:1.0.0:*:*:*:*:*:*:* Versions 1.0.0 Vulnerable ·Starkbank

Remediation

  • Fix · GHSA-xx36-6rv4-gj8r ecdsa-elixir (Hex) Fixed in 1.0.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43568
  2. 2026-10-03 Alias added: GHSA-xx36-6rv4-gj8r

References

Exploit 1

Advisory 2

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences