CVE-2026-1229
February 24, 2026
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 .
Affected Packages
https://github.com/cloudflare/circl.git (GITHUB):
Affected version(s) >=v1.6.0 <v1.6.3Fix Suggestion:
Update to version v1.6.3github.com/cloudflare/circl (GO):
Affected version(s) >=v1.0.0 <v1.6.3Fix Suggestion:
Update to version v1.6.3Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
LOW
Exploit Maturity
POC
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Incorrect Calculation
EPSS
Base Score:
0.02
