CVE-2026-45366

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{"affected": [{"affectedData": [{"product": "typescript-utcp", "vendor": "universal-tool-calling-protocol", "versions": [{"status": "affected", "version": "< 1.1.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "typescript-utcp is a typescript implementation of UTCP. Prior to 1.1.2, the @utcp/http package is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. registerManual() validates the discovery URL against an HTTPS / loopback allowlist, but callTool() reuses the resolved toolCallTemplate.url directly without revalidating, and the OpenApiConverter blindly trusts whatever servers[0].url an attacker-hosted spec declares. An attacker who hosts a malicious OpenAPI spec on a legitimate HTTPS endpoint can declare e.g. servers: [{ url: \"http://127.0.0.1:9090\" }] or servers: [{ url: \"http://169.254.169.254\" }]; the converter then produces tools whose URL points at internal services on the agent host. This vulnerability is fixed in 1.1.2."}, {"lang": "es", "value": "typescript-utcp es una implementaci\u00f3n de UTCP en typescript. Antes de la versi\u00f3n 1.1.2, el paquete @utcp/http es vulnerable a una falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) ciega causada por una inconsistencia en el l\u00edmite de confianza entre el descubrimiento manual y la invocaci\u00f3n de herramientas. registerManual() valida la URL de descubrimiento contra una lista de permitidos de HTTPS / loopback, pero callTool() reutiliza directamente la URL resuelta de toolCallTemplate.url sin revalidar, y el OpenApiConverter conf\u00eda ciegamente en cualquier servers[0].url que declare una especificaci\u00f3n alojada por un atacante. Un atacante que aloja una especificaci\u00f3n OpenAPI maliciosa en un punto final HTTPS leg\u00edtimo puede declarar, por ejemplo, servers: [{ url: 'http://127.0.0.1:9090' }] o servers: [{ url: 'http://169.254.169.254' }]; el conversor entonces produce herramientas cuya URL apunta a servicios internos en el host del agente. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 1.1.2."}], "id": "CVE-2026-45366", "lastModified": "2026-07-21T10:10:00.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45366", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-29T13:56:02.351079Z", "version": "2.0.3"}}]}, "published": "2026-05-28T22:17:00.773", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.1.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "typescript-utcp", "vendor": "universal-tool-calling-protocol"}], "created": "2026-05-28T22:30:28.287032+00:00", "updated": "2026-05-30T21:19:08.953357+00:00", "vendors": ["universal-tool-calling-protocol", "universal-tool-calling-protocol$PRODUCT$typescript-utcp"]}