CVE-2026-1229

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected.

The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-682

Affected software

VendorProductVersions
CloudflareCIRCL>= CIRCL up to version 1.6.2, < 1.6.3

References

Timeline

Published
Feb 24, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-1229: Critical severity, CVSS 9.8 | Vulnix