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Vulnerability Details :

CVE-2026-1229

Summary
Assigner-cloudflare
Assigner Org ID-a22f1246-ba21-4bb4-a601-ad51614c1513
Published At-24 Feb, 2026 | 07:58
Updated At-24 Feb, 2026 | 15:10
Rejected At-
Credits

Incorrect calculation in CIRCL secp384r1 CombinedMult

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 .

Vendors
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Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:cloudflare
Assigner Org ID:a22f1246-ba21-4bb4-a601-ad51614c1513
Published At:24 Feb, 2026 | 07:58
Updated At:24 Feb, 2026 | 15:10
Rejected At:
▼CVE Numbering Authority (CNA)
Incorrect calculation in CIRCL secp384r1 CombinedMult

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 Products
Vendor
Cloudflare, Inc.Cloudflare
Product
CIRCL
Repo
https://github.com/cloudflare/circl
Platforms
  • Go
Default Status
unaffected
Versions
Affected
  • From CIRCL up to version 1.6.2 before 1.6.3 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-682CWE-682 Incorrect Calculation
Type: CWE
CWE ID: CWE-682
Description: CWE-682 Incorrect Calculation
Metrics
VersionBase scoreBase severityVector
4.02.9LOW
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
Version: 4.0
Base score: 2.9
Base severity: LOW
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Guido Vranken
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/cloudflare/circl
N/A
Hyperlink: https://github.com/cloudflare/circl
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cna@cloudflare.com
Published At:24 Feb, 2026 | 08:16
Updated At:24 Feb, 2026 | 14:13

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 .

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.9LOW
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
Type: Secondary
Version: 4.0
Base score: 2.9
Base severity: LOW
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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-682Secondarycna@cloudflare.com
CWE ID: CWE-682
Type: Secondary
Source: cna@cloudflare.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/cloudflare/circlcna@cloudflare.com
N/A
Hyperlink: https://github.com/cloudflare/circl
Source: cna@cloudflare.com
Resource: N/A

Change History

0
Information is not available yet

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