What’s Vulnerable › Vulnerabilities

CVE-2019-20399

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-23 · updated 2026-06-17
• Weakness: CWE-203

Description

A timing vulnerability in the Scalar::check_overflow function in Parity libsecp256k1-rs before 0.3.1 potentially allows an attacker to leak information via a side-channel attack.

Affected products

• Parity Libsecp256K1: before 0.3.1 — fixed in 0.3.1

How to fix

Upgrade to a fixed version: Parity Libsecp256K1 0.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/paritytech/libsecp256k1/commit/11ba23a9766a5079918cd9f515bc100bc8164b50
• https://github.com/paritytech/libsecp256k1/commit/11ba23a9766a5079918cd9f515bc100bc8164b50

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