Signature verification vulnerability in Stark Bank ecdsa libraries
An attacker can forge signatures on arbitrary messages that will verify for any public key. This may allow attackers to authenticate as any user within the Stark Bank platform, and bypass signature verification needed to perform operations on the platform, such as send payments and transfer funds. Additionally, the ability for attackers to forge signatures may impact other users and projects using these libraries in different and unforeseen ways.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.starkbank:ecdsa-java | >= 1.0.0, < 1.0.1 | 1.0.1 |
| npm package | starkbank-ecdsa | >= 1.1.2, < 1.1.3 | 1.1.3 |
| .NET (NuGet) | starkbank-ecdsa | >= 1.3.1, < 1.3.2 | 1.3.2 |
| Python (PyPI) | starkbank-ecdsa | < 2.0.1 | 2.0.1 |
References
- https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f
- https://github.com/starkbank/ecdsa-dotnet
- https://github.com/starkbank/ecdsa-java
- https://github.com/starkbank/ecdsa-node
- https://github.com/starkbank/ecdsa-python
- https://github.com/starkbank/ecdsa-python/compare/v2.0.0...v2.0.1
- https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1
- https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries
- Weakness (CWE)
CWE-347- Platform
- Java / Kotlin (Maven), npm, .NET (NuGet), Python (PyPI)
- Package
com.starkbank:ecdsa-java, starkbank-ecdsa- Disclosed
- 08.11.2021
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9wx7-jrvc-28mm - CC BY 4.0
Vulnerability history: starkbank-ecdsa
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2021 11.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 1
Disclosures per year
- 2021: 2
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Signature verification vulnerability in Stark Bank ecdsa libraries this entry
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