CVE-2026-64651

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{"affected": [{"affectedData": [{"product": "@ai-sdk/harness-opencode", "vendor": "vercel", "versions": [{"status": "affected", "version": "< 1.0.29"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The `@ai-sdk/harness-opencode` tool connects HarnessAgent to OpenCode through a sandboxed bridge. Prior to version 1.0.28, the tool relay authorizes requests from any process whose command line contains an allowed helper script path (`host-tool-mcp.mjs`). This allows untrusted code executing in the sandbox to invoke arbitrary host-exposed tools including secret lookups, deployment operations, and cloud API calls without a corresponding model-authorized tool-call event. Exploitation requires a Linux environment (the vulnerable fallback checks `process.platform === 'linux'` and reads `/proc`); an active harness session with one or more host-provided tools; and untrusted code executing in the sandbox (e.g. a malicious dependency, build script, or lifecycle hook) The fix in version 1.0.28 removes the process-path authorization fallback entirely. Relay requests are now only accepted after exact, short-lived, one-time authorization matching the tool name and input from a bridge-observed model event. Some workarounds are available. Do not run the OpenCode harness on untrusted repositories or with untrusted dependencies, and/or limit host-exposed tools to non-sensitive operations when working with untrusted code."}, {"lang": "es", "value": "La herramienta \u201c@ai-sdk/harness-opencode\u201d conecta HarnessAgent con OpenCode a trav\u00e9s de un puente en un sandbox. Antes de la versi\u00f3n 1.0.28, el rel\u00e9 de la herramienta autoriza solicitudes de cualquier proceso cuya l\u00ednea de comandos contenga una ruta de script auxiliar permitida (\u2019host-tool-mcp.mjs\u2019). Esto permite que c\u00f3digo no confiable ejecut\u00e1ndose en el sandbox invoque herramientas arbitrarias expuestas al host, incluyendo b\u00fasquedas de secretos, operaciones de despliegue y llamadas a la API en la nube sin un evento de llamada a herramienta autorizado por el modelo correspondiente. La explotaci\u00f3n requiere un entorno Linux (la comprobaci\u00f3n de reserva vulnerable verifica \u2019process.platform === \u2019linux\u2019\u2019 y lee \u2019/proc\u2019); una sesi\u00f3n de harness activa con una o m\u00e1s herramientas proporcionadas por el host; y c\u00f3digo no confiable ejecut\u00e1ndose en el sandbox (por ejemplo, una dependencia maliciosa, un script de compilaci\u00f3n o un hook de ciclo de vida). La correcci\u00f3n en la versi\u00f3n 1.0.28 elimina por completo la reserva de autorizaci\u00f3n por ruta de proceso. Las solicitudes de rel\u00e9 ahora solo se aceptan despu\u00e9s de una autorizaci\u00f3n exacta, de corta duraci\u00f3n y de un solo uso que coincida con el nombre de la herramienta y la entrada de un evento de modelo observado por el puente. Algunas soluciones alternativas est\u00e1n disponibles. No ejecute el harness de OpenCode en repositorios no confiables o con dependencias no confiables, y/o limite las herramientas expuestas al host a operaciones no sensibles cuando trabaje con c\u00f3digo no confiable."}], "id": "CVE-2026-64651", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64651", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-21T12:49:24.395782Z", "version": "2.0.3"}}]}, "published": "2026-07-20T21:16:50.677", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/vercel/ai/pull/17105"}, {"source": "security-advisories@github.com", "url": "https://github.com/vercel/ai/security/advisories/GHSA-g48p-5rr5-8rgq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.29)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "@ai-sdk/harness-opencode", "source": "cna", "vendor": "vercel"}, "product": "ai-sdk", "vendor": "vercel"}], "created": "2026-07-23T21:21:03.738599+00:00", "updated": "2026-07-30T18:30:05.025898+00:00", "vendors": ["vercel", "vercel$PRODUCT$ai-sdk"]}