What is the CVSS score of CVE-2026-1229?

CVE-2026-1229 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Github are affected by CVE-2026-1229?

A critical vulnerability in CIRCL's elliptic curve cryptography implementation (CVE-2026-1229, CVSS 9.8) affects organizations using secp384r1 curve operations, potentially compromising cryptographic…. A patch is available.

How to fix or mitigate CVE-2026-1229?

Within 24 hours: Inventory all applications and systems using CIRCL ecc/p384 package and assess exposure scope; notify security teams and relevant business units. Within 7 days: Implement network segmentation and access controls around affected systems; engage vendor for patch ETA and interim guidance; evaluate alternative cryptographic libraries for migration feasibility. Within 30 days: Execute remediation plan—either apply vendor patch immediately upon release or migrate to alternative vetted elliptic curve implementations; validate cryptographic operations post-remediation.

Github CVE-2026-1229

CRITICAL

Incorrect Calculation (CWE-682)

2026-02-24 cna@cloudflare.com

GHSA-q9hv-hpm4-hj6x

Github Circl Suse Cloudflare

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SUSE

CRITICAL

qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 24, 2026 - 08:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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 .

AnalysisAI

Incorrect computation in CIRCL cryptographic library's CombinedMult function for secp384r1 (P-384) curve. Produces wrong elliptic curve multiplication results for specific inputs, potentially breaking ECDSA signature verification.

Technical ContextAI

CWE-682 incorrect calculation in CombinedMult for secp384r1. The CIRCL library (Cloudflare's Go cryptographic library) produces incorrect results for specific P-384 inputs, which could cause ECDSA verification to accept invalid signatures or reject valid ones.

RemediationAI

Update CIRCL library immediately. Applications using CIRCL for P-384 operations should verify cryptographic operations after update.

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Vendor StatusVendor

SUSE

Severity: Critical

Product	Status
openSUSE Tumbleweed	Fixed
openSUSE Leap 15.6	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP5	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6	Fixed
openSUSE Leap 15.5	Fixed

CVE-2026-1229 vulnerability details – vuln.today

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Github CVE-2026-1229

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

More in Github

Same weakness CWE-682 – Incorrect Calculation

Vendor StatusVendor

SUSE

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External POC / Exploit Code