{"id":"EUVD-2026-33053","revision":null,"records":[{"revision":"d7e4bbfaaf204f80aac6f9992b18980a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-45366","aliases":[],"title":"typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol","description":"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.","state":0,"publishedAt":"2026-05-28T20:38:16.78+00:00","modifiedAt":"2026-05-29T13:56:10.659+00:00","affected":[{"ecosystem":"Vendor product","name":"typescript-utcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"universal-tool-calling-protocol\",\n                    \"product\": \"typescript-utcp\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.1.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45366","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-45366","identifiers":["CVE-2026-45366"]},"retained":false,"historicalAffected":[]},{"revision":"1aedaeba457e43f89af1d29a83bf5eff","observedAt":"2026-11-13T15:08:08.174+00:00","statement":{"source":"euvd","id":"EUVD-2026-33053","aliases":["CVE-2026-45366","GHSA-r8j5-8747-88cm"],"title":"typescript-utcp is a typescript implementation of UTCP. 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This vulnerability is fixed in 1.1.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":4.7,"severity":null}],"references":["https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-33053","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 28, 2026, 8:38:16 PM","dateUpdated":"May 29, 2026, 1:56:10 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. 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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.","state":0,"publishedAt":"2026-05-28T22:17:00.773+00:00","modifiedAt":"2026-07-21T10:10:00.103+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45366","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-918"],"productCriteria":[],"sourceDates":{"published":"2026-05-28T22:17:00.773","lastModified":"2026-07-21T10:10:00.103"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-45366","identifiers":["CVE-2026-45366"]},"retained":false,"historicalAffected":[]},{"revision":"777f2ceea4934e6598a64d59525f16dc","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-r8j5-8747-88cm","aliases":["CVE-2026-45366"],"title":"@utcp/http: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol","description":"## Summary\n\nThe `@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.\n\nA separate prefix-bypass also affected the discovery-time check: the previous `startsWith('http://localhost')` guard let URLs like `http://localhost.evil.com` through.\n\n## Sister advisory\n\nThis is the npm/TypeScript counterpart of [GHSA-39j6-4867-gg4w / CVE-2026-44661](https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-39j6-4867-gg4w) on the Python `utcp-http` package. Same vulnerability, same fix shape, same reporter.\n\n## Versions and patch state\n\n- `@utcp/http <= 1.1.1` — vulnerable. Both the loopback-redirect (`http://127.0.0.1`) and the non-loopback internal-IP variants (e.g. `http://169.254.169.254`, `http://10.0.0.5`) succeed. Note: the `streamable_http` and `sse` `callToolStreaming` paths in 1.1.1 are TODO placeholders and don't actually fetch URLs, so the runtime SSRF surface in these protocols is currently confined to discovery — a future implementation must also call `ensureSecureUrl` before issuing the request.\n- `@utcp/http 1.1.2` — full fix. Runtime revalidation in `callTool` closes the non-loopback variants; the `OpenApiConverter` rejects, at conversion time, any spec fetched from a non-loopback source that declares a loopback `servers[0].url`, closing the loopback-redirect variant.\n\n## Impact\n\nA remote attacker who can convince the agent (via the LLM context, prompt injection, or a tool-discovery surface) to register their HTTPS OpenAPI URL can:\n- Map internal networks behind the agent.\n- Read AWS/GCP IAM credentials from cloud metadata endpoints (`http://169.254.169.254`, `http://metadata.google.internal`).\n- Reach unauthenticated internal services exposed on loopback (Elasticsearch, Redis HTTP, internal admin panels, the agent's own HTTP server).\n- Have responses returned to the LLM, which combined with prompt injection enables exfiltration back to the attacker.\n\n## Patch\n\nCommit on `dev`: 21f63e6.\n\nNew helper `packages/http/src/_security.ts` exposes `isSecureUrl`, `isLoopbackUrl`, `ensureSecureUrl`. Hostname-based validation closes the prefix bypass (`http://localhost.evil.com` → rejected). All three protocols' `registerManual` now call `ensureSecureUrl(url, 'manual discovery')`; `callTool` re-checks the resolved URL with `ensureSecureUrl(url, 'tool invocation')` immediately before the axios request. `OpenApiConverter` rejects remote spec → loopback server.\n\n## Workarounds\n\nFor users who cannot upgrade immediately:\n- Refuse to call `registerManual` with any URL controlled by an untrusted party, even over HTTPS.\n- Restrict outbound network access from the host running the agent so internal addresses (RFC1918, 169.254.0.0/16, loopback) are unreachable.\n\n## Credit\n\nDiscovered and reported by [@YLChen-007](https://github.com/YLChen-007) against the Python sibling implementation (universal-tool-calling-protocol/python-utcp#83). The TypeScript port shared the same code shape and the same vulnerability.","state":0,"publishedAt":"2026-05-14T20:55:05+00:00","modifiedAt":"2026-09-10T03:50:47.3636166+00:00","affected":[{"ecosystem":"npm","name":"@utcp/http","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.1.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm","https://nvd.nist.gov/vuln/detail/CVE-2026-45366","https://github.com/universal-tool-calling-protocol/python-utcp/issues/83","https://github.com/universal-tool-calling-protocol/typescript-utcp"],"sourceUrl":"https://github.com/advisories/GHSA-r8j5-8747-88cm","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-r8j5-8747-88cm","identifiers":["GHSA-r8j5-8747-88cm","CVE-2026-45366"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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