CVE-2026-45366— typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol
Possible ATT&CK Techniques 1AI
T1598.002 · Spearphishing AttachmentAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| universal-tool-calling-protocol | typescript-utcp | < 1.1.2 | affected |
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I. Basic Information for CVE-2026-45366
Vulnerability Information
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Vulnerability Title
typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Universal Tool Calling Protocol 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Universal Tool Calling Protocol是Universal Tool Calling Protocol开源的一个UTCP的官方python实现库。 Universal Tool Calling Protocol 1.1.2之前版本存在代码问题漏洞，该漏洞源于@utcp/http包存在盲SSRF，registerManual()验证发现URL但callTool()重用已解析的toolCallTemplate.url而未重新验证，OpenApiConverter盲目信任攻击者托管规范中
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| universal-tool-calling-protocol | typescript-utcp | < 1.1.2 | - |
II. Public POCs for CVE-2026-45366
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-45366 (1)
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V. Comments for CVE-2026-45366
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