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    "cveMetadata": {
        "cveId": "CVE-2026-108698",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-10T23:08:36.107Z",
        "datePublished": "2026-10-11T13:25:58.805Z",
        "dateUpdated": "2026-10-11T13:25:58.805Z"
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            "datePublic": "2026-10-11T00:00:00.000Z",
            "title": "hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition",
            "descriptions": [
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                    "lang": "en",
                    "value": "hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities."
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                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Time-of-check Time-of-use (TOCTOU) Race Condition",
                            "cweId": "CWE-367",
                            "type": "CWE"
                        }
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                }
            ],
            "affected": [
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                    "vendor": "hyper-mcp-rs",
                    "product": "hyper-mcp",
                    "defaultStatus": "unaffected",
                    "versions": [
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                            "version": "0",
                            "lessThanOrEqual": "0.8.3",
                            "status": "affected",
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.3,
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                        "scope": "UNCHANGED",
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                        "integrityImpact": "HIGH",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM"
                    }
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            ],
            "references": [
                {
                    "url": "https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/hyper-mcp-oci-signature-manifest-toctou",
                    "tags": [
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                    "name": "VulnCheck Advisory: hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition",
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