VDB-347524 · CVE-2026-1229 · EUVD-2026-7384

Cloudflare CIRCL up to 1.6.2 ecc p384 CombinedMult calculation

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7.6	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cloudflare CIRCL up to 1.6.2. Affected by this issue is the function CombinedMult of the component ecc p384. Executing a manipulation can lead to calculation. The identification of this vulnerability is CVE-2026-1229. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cloudflare CIRCL up to 1.6.2. It has been declared as problematic. This vulnerability affects the function CombinedMult of the component ecc p384. The manipulation with an unknown input leads to a calculation vulnerability. The CWE definition for the vulnerability is CWE-682. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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 .

The weakness was shared by Guido Vranken. The advisory is shared for download at github.com. This vulnerability was named CVE-2026-1229 since 01/20/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 300048 (Linux Distros Unpatched Vulnerability : CVE-2026-1229), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.6.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (300048) and EUVD (EUVD-2026-7384). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Cloud Software

Vendor

Cloudflare

Name

CIRCL

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Calculation
CWE: CWE-682
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 300048
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-1229

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CIRCL 1.6.3

Timelineinfo

01/20/2026 CVE reserved
02/24/2026 +35 days Advisory disclosed
02/24/2026 +0 days VulDB entry created
03/03/2026 +7 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Researcher: Guido Vranken
Status: Confirmed

CVE: CVE-2026-1229 (🔒)
GCVE (CVE): GCVE-0-2026-1229
GCVE (VulDB): GCVE-100-347524
EUVD: 🔒

Entryinfo

Created: 02/24/2026 09:36
Updated: 03/03/2026 08:11
Changes: 02/24/2026 09:36 (72), 02/24/2026 13:46 (1), 02/28/2026 05:40 (2), 03/03/2026 08:11 (12)
Complete: 🔍
Cache ID: 216::103