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    "cveMetadata": {
        "cveId": "CVE-2026-59563",
        "assignerOrgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
        "state": "PUBLISHED",
        "assignerShortName": "Zscaler",
        "dateReserved": "2026-07-06T06:18:59.633Z",
        "datePublished": "2026-09-28T12:54:52.446Z",
        "dateUpdated": "2026-09-28T13:31:27.587Z"
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                "dateUpdated": "2026-09-28T12:54:52.446Z"
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            "title": "HMAC Confirmation Token Unbinding in zscaler-mcp-server",
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                            "lang": "en",
                            "cweId": "CWE-305",
                            "description": "CWE-305 Authentication bypass by primary weakness",
                            "type": "CWE"
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                    ]
                }
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            "impacts": [
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                    "capecId": "CAPEC-21",
                    "descriptions": [
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                            "lang": "en",
                            "value": "CAPEC-21 Exploitation of Trusted Identifiers"
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                    ]
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                    "vendor": "Zscaler",
                    "product": "zscaler-mcp-server",
                    "repo": "https://github.com/zscaler/zscaler-mcp-server",
                    "versions": [
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                            "version": "0.7.0",
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                    "value": "Zscaler MCP Server versions 0.7.0 and 0.7.1 has an issue where HMAC confirmation tokens were not bound to the target resource identifier, allowing an MCP client or agent to replay a token generated for one resource to affect another resource of the same type. This issue is fixed in version 0.7.2.",
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            "references": [
                {
                    "url": "https://github.com/zscaler/zscaler-mcp-server/pull/41"
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                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "REQUIRED",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "LOW",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 4.6,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L"
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            "credits": [
                {
                    "lang": "en",
                    "value": "Sebastián Alba Vives",
                    "type": "finder"
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            "source": {
                "discovery": "UNKNOWN"
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        "adp": [
            {
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                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-59563",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                    {
                                        "Automatable": "no"
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                                "version": "2.0.3",
                                "timestamp": "2026-09-28T13:18:33.827712Z"
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