What’s Vulnerable › Vulnerabilities

CVE-2024-49364: tiny-secp256k1 vulnerable to private key extraction when signing a malicious JSON-stringifyable message in bundled environment

• Severity: high (CVSS 8.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-01 · updated 2026-06-17
• Weakness: CWE-522

Description

tiny-secp256k1 is a tiny secp256k1 native/JS wrapper. Prior to version 1.1.7, a private key can be extracted on signing a malicious JSON-stringifiable object, when global Buffer is the buffer package. This affects only environments where require('buffer') is the NPM buffer package. The Buffer.isBuffer check can be bypassed, resulting in k reuse for different messages, leading to private key extraction over a single invalid message (and a second one for which any message/signature could be taken, e.g. previously known valid one). This issue has been patched in version 1.1.7.

Affected products

• bitcoinjs tiny-secp256k1: before 1.1.7

References

• https://github.com/bitcoinjs/tiny-secp256k1/pull/140
• https://github.com/bitcoinjs/tiny-secp256k1/security/advisories/GHSA-7mc2-6phr-23xc
• https://github.com/bitcoinjs/tiny-secp256k1/security/advisories/GHSA-7mc2-6phr-23xc

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