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        "cveId": "CVE-2026-102503",
        "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "state": "PUBLISHED",
        "assignerShortName": "Google",
        "dateReserved": "2026-09-29T11:07:35.558Z",
        "datePublished": "2026-10-19T02:20:35.753Z",
        "dateUpdated": "2026-10-19T17:46:47.397Z"
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                "shortName": "Google",
                "dateUpdated": "2026-10-19T02:20:35.753Z"
            },
            "title": "Missing Authentication on /libp2p-http Ingress in Google OSS Agent Mesh (SAM)",
            "datePublic": "2026-09-04T06:09:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-306",
                            "description": "CWE-306 Missing Authentication for Critical Function",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-862",
                            "description": "CWE-862 Missing Authorization",
                            "type": "CWE"
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            "impacts": [
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                    "capecId": "CAPEC-115",
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                            "lang": "en",
                            "value": "CAPEC-180 Exploiting Incorrectly Configured Access Control Security Levels"
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            ],
            "affected": [
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                    "vendor": "Google",
                    "product": "SAM",
                    "packageName": "github.com/google/sam",
                    "versions": [
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                            "status": "affected",
                            "version": "0.1.0-alpha.1",
                            "lessThan": "0.1.0-alpha.3",
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                    "value": "Missing Authentication for Critical Function (CWE-306) and Missing Authorization (CWE-862) in the /libp2p-http ingress server (StartIngressServer in cmd/sam-node/node.go) in Google OSS Agent Mesh (SAM) versions 0.1.0-alpha.1 through 0.1.0-alpha.2 allow an unauthenticated remote libp2p peer to bypass Biscuit capability policy enforcement and invoke arbitrary registered backend services (including command/stdio-backed MCP servers, A2A, and inference endpoints). While the MCP protocol stream handler enforces WithBiscuitAuth and Authorize checks, the parallel /libp2p-http ingress routes requests directly to backend service handlers without verifying a Biscuit token or mesh enrollment. Users should upgrade to version 0.1.0-alpha.3 or later.",
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            ],
            "references": [
                {
                    "url": "https://github.com/google/sam/security/advisories/GHSA-r6hp-67wp-c7jx",
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                    "url": "https://github.com/google/sam/commit/433bc99d2a2c10071167bf22acc2c930a12e64e1",
                    "tags": [
                        "patch"
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                    "tags": [
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                        "attackComplexity": "LOW",
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                        "subConfidentialityImpact": "NONE",
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                        "subIntegrityImpact": "NONE",
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                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
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                                "timestamp": "2026-10-19T17:46:04.092443Z",
                                "id": "CVE-2026-102503",
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                "title": "CISA ADP Vulnrichment",
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