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CVE-2026-67399

WHMCS · Vulnerability

CVSS 4.0 9.3 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-67399

Published

Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-67399

Published

WHMCS

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "vendor": "WebPros",
                    "product": "WHMCS",
                    "versions": [
                        {
                            "version": "9.0.0",
                            "status": "affected",
                            "lessThan": "9.0.8",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.0.0",
                            "status": "affected",
                            "lessThan": "8.13.7",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON