{"id":"CVE-2026-129094","state":"PUBLISHED","title":"@utcp/http before 1.1.14 SSRF to Loopback via Host Placeholder in Call Templates","description":"@utcp/http before 1.1.14 contains a server-side request forgery vulnerability that allows remote manuals to reach loopback services by bypassing the remote-loopback check with a {host} placeholder. Attackers can supply host arguments like 127.0.0.1 or register tools via Streamable HTTP and SSE discovery to access internal services on the agent machine.","publishedAt":"2026-11-13T15:19:40.767Z","updatedAt":"2026-11-13T15:19:40.767Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["universal-tool-calling-protocol @utcp/http"],"affected":[{"vendor":"universal-tool-calling-protocol","product":"@utcp/http","packageURL":"pkg:npm/%40utcp/http","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.1.14","versionType":"semver"}],"collectionURL":"https://www.npmjs.com/package/@utcp/http","repo":"https://github.com/universal-tool-calling-protocol/typescript-utcp"}],"references":["https://github.com/universal-tool-calling-protocol/typescript-utcp/pull/58","https://github.com/universal-tool-calling-protocol/typescript-utcp/pull/60","https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm","https://www.npmjs.com/package/@utcp/http","https://www.vulncheck.com/advisories/utcp-http-before-1.1.14-ssrf-to-loopback-via-host-placeholder-in-call-templates"],"weaknesses":["CWE-918"],"ingestedAt":"2026-11-13T15:30:06.373Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/129xxx/CVE-2026-129094.json","commit":"2714b8853850bd252b508245093ae91d2bf64250","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-129094","state":"PUBLISHED","datePublished":"2026-11-13T15:19:40.767Z","dateUpdated":"2026-11-13T15:19:40.767Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-11-13T15:18:30.244Z"},"containers":{"cna":{"title":"@utcp/http before 1.1.14 SSRF to Loopback via Host Placeholder in Call Templates","descriptions":[{"lang":"en","value":"@utcp/http before 1.1.14 contains a server-side request forgery vulnerability that allows remote manuals to reach loopback services by bypassing the remote-loopback check with a {host} placeholder. Attackers can supply host arguments like 127.0.0.1 or register tools via Streamable HTTP and SSE discovery to access internal services on the agent machine."}],"affected":[{"vendor":"universal-tool-calling-protocol","product":"@utcp/http","packageURL":"pkg:npm/%40utcp/http","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.1.14","versionType":"semver"}],"collectionURL":"https://www.npmjs.com/package/@utcp/http","repo":"https://github.com/universal-tool-calling-protocol/typescript-utcp"}],"references":[{"url":"https://github.com/universal-tool-calling-protocol/typescript-utcp/pull/58","tags":["patch","issue-tracking"]},{"url":"https://github.com/universal-tool-calling-protocol/typescript-utcp/pull/60","tags":["patch","issue-tracking"]},{"url":"https://github.com/universal-tool-calling-protocol/typescript-utcp/security/advisories/GHSA-r8j5-8747-88cm","tags":["related","vendor-advisory"],"name":"GitHub Security Advisory (GHSA-r8j5-8747-88cm)"},{"url":"https://www.npmjs.com/package/@utcp/http","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/utcp-http-before-1.1.14-ssrf-to-loopback-via-host-placeholder-in-call-templates","name":"VulnCheck Advisory: @utcp/http before 1.1.14 SSRF to Loopback via Host Placeholder in Call Templates","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-11-13T15:19:40.767Z"},"datePublic":"2026-10-25T00:00:00.000Z","credits":[{"lang":"en","value":"Zachariah Mithani (AploSec)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}