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    "cveMetadata": {
        "cveId": "CVE-2026-101058",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-09-27T16:38:56.428Z",
        "datePublished": "2026-09-27T17:02:39.400Z",
        "dateUpdated": "2026-09-30T22:06:29.482Z"
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            "datePublic": "2026-09-05T00:00:00.000Z",
            "title": "python-utcp before 1.1.12 SSRF via Remote HTTP Manual",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written UTCP manual point at the agent's own loopback interface when that manual is discovered from a remote, non-loopback origin. Because ensure_secure_url intentionally permits loopback HTTP for local development and native manuals bypassed the loopback check performed by the OpenAPI converter, an attacker who can serve a UTCP manual that a victim registers can cause the client to issue requests to services bound only to 127.0.0.1 on the victim host and have the response bodies returned to the caller (server-side request forgery). The http, sse and streamable_http protocols are all affected. Reach is limited to loopback, and exploitation further requires a loopback service that answers unauthenticated requests with useful data. Fixed in utcp-http 1.1.12, which rejects manuals fetched from a non-loopback origin that declare loopback tool URLs, keyed off the final post-redirect discovery URL."
                }
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                    "descriptions": [
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                            "lang": "en",
                            "description": "Server-Side Request Forgery (SSRF)",
                            "cweId": "CWE-918",
                            "type": "CWE"
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            "affected": [
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                    "vendor": "universal-tool-calling-protocol",
                    "product": "python-utcp",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/utcp-http",
                    "versions": [
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                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "1.1.12"
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                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
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            "references": [
                {
                    "url": "https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-8vxx-v7r9-948g",
                    "tags": [
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                                "timestamp": "2026-09-30T22:06:18.895295Z",
                                "id": "CVE-2026-101058",
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                                        "Exploitation": "none"
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                "title": "CISA ADP Vulnrichment",
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