Vulnerability Report

CVE-2026-1229

Title: Incorrect value in CIRCL ecc/p384 CombinedMult function

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-1229.

CWE Category CWE-682

Published Date Feb 24, 2026

Modified Date Mar 03, 2026

Exploit Status Not Found

Score 2.9 CVSS v4.0

Exploit Probability (EPSS)

0.03%

Vulnerability Summary

CVE-2026-1229: 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 .

Impacted Vendors

cloudflare 1

Reference Links

https://github.com/cloudflare/circl

CVSS v4.0

Source Entity [email protected]

Severity LOW

2.9

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:X/RE:X/U:Amber

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-1229 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 03, 2026 MODIFIED

Vulnerability data updated via NVD.

March 03, 2026 MODIFIED

Vulnerability data updated via NVD.

February 24, 2026 MODIFIED

Vulnerability data updated via NVD.

February 24, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:X/RE:X/U:Amber

Affected Stack

No specific products linked.