CVE-2026-1229 LOW

CVE-2026-1229: Incorrect calculation in CIRCL secp384r1 CombinedMult

Vendor Cloudflare
Product CIRCL
Weakness CWE-682
Published February 24, 2026
Last update February 24, 2026
View on NVD All CVEs

CVSS base score

2.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/U:Amber

What the vulnerability does

01Description

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 .

Key dates

02Disclosure timeline

February 24, 2026 CVE published
February 24, 2026 Record updated