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CVE-2026-101060— python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects

Quick assessment

Affected
universal-tool-calling-protocol python-utcp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 python-utcp 1.1.4 之前的版本中，HttpCommunicationProtocol.call_tool 存在服务器端请求伪造（SSRF）漏洞。该函数虽然对初始工具 URL 进行了验证，但在跟随 HTTP 重定向时未重新验证目标地址。攻击者若能控制工具端点，即可返回一个 302 重定向响应，将 UTCP 客户端重定向至内部服务或云元数据端点，并获取这些内部服务的响应内容返回给调用者。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1071.002 · File Transfer Protocols
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I. Basic Information for CVE-2026-101060

Vulnerability Information
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Vulnerability Title
python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects
Source: CVE Program / CVE List V5
Vulnerability Description
python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
universal-tool-calling-protocol python-utcp 0 ~ 1.1.4 -

II. Public POCs for CVE-2026-101060

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III. Intelligence Information for CVE-2026-101060

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Vendor Advisories for CVE-2026-101060 (1)

Other References for CVE-2026-101060 (1)

Same Patch Batch · universal-tool-calling-protocol · 2026-09-27 · 5 CVEs total

CVE-2026-101059 7.1 HIGH utcp-http before 1.1.4 OAuth2 tokenUrl Trust Boundary Bypass
CVE-2026-101058 6.9 MEDIUM python-utcp before 1.1.12 SSRF via Remote HTTP Manual
CVE-2026-101061 4.7 MEDIUM utcp-gql and utcp-websocket before 1.1.1 SSRF via URL validation bypass
CVE-2026-101057 3.1 LOW utcp-mcp before 1.1.3 SSRF via unvalidated MCP server URL

IV. Related Vulnerabilities

Same product: python-utcp
Same vendor: universal-tool-calling-protocol
Same weakness: CWE-918

V. Comments for CVE-2026-101060

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