CVE-2026-19377Published

Improper certificate validation in Cato Client tunnel handshake

cve-program · CVE-2026-19377

Published

Cato Client for Windows

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Cato Networks",
                    "product": "Cato Client for Windows",
                    "platforms": [
                        "Windows"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "6.12.6",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Cato Client for macOS

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Cato Networks",
                    "product": "Cato Client for macOS",
                    "platforms": [
                        "macOS"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "6.1.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Cato Client for Linux

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Cato Networks",
                    "product": "Cato Client for Linux",
                    "platforms": [
                        "Linux"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "5.8.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Cato Client for iOS

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Cato Networks",
                    "product": "Cato Client for iOS",
                    "platforms": [
                        "iOS"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "5.9",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Cato Client for Android

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Cato Networks",
                    "product": "Cato Client for Android",
                    "platforms": [
                        "Android"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "5.6.2",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

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