A timing vulnerability in the Scalar::check_overflow function in Parity libsecp256k1-rs…
Priority LOW 28CWE-203Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-203.
Summary
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.
Why it matters now
EPSS 0.00881 59th percentileScored 2026-11-07
Fix Fixed libsecp256k1-rs (crates.io): 0.3.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | libsecp256k1-rs (crates.io) | before 0.3.1 | 0.3.1 | Patch available | GHSA-7cqg-8449-rmfv |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- libsecp256k1-rs (crates.io) Vendor— Affected before 0.3.1 Fixed in 0.3.1 Patch available GHSA-7cqg-8449-rmfv
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:parity:libsecp256k1:*:*:*:*:*:*:*:* | before 0.3.1 | Vulnerable | paritytech |
- cpe:2.3:a:parity:libsecp256k1:*:*:*:*:*:*:*:* Versions before 0.3.1 Vulnerable ·paritytech
Remediation
- Fix · GHSA-7cqg-8449-rmfv libsecp256k1-rs (crates.io) Fixed in 0.3.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2019-20399
- 2026-10-03 Alias added: GHSA-7cqg-8449-rmfv
References
More paritytech Libsecp256k1 vulnerabilities
- TI-2021-15872 An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. CVSS 3.1CRITICAL 9.8
- TI-2019-15144 An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. CVSS 3.1HIGH 7.5
Sources
- CVE-2019-20399 · CVE Program
- CVE-2019-20399 · NVD
- FIRST EPSS
- GHSA-7cqg-8449-rmfv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences