CVE-2026-44661 - python-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

CVE-2026-44661 - python-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

https://cvefeed.io/rssfeed/latest.atom / Fri, 05/15/2026 - 02:23
CVE ID :CVE-2026-44661
Published : May 14, 2026, 9:16 p.m. | 2 hours, 7 minutes ago
Description :python-utcp is the python implementation of UTCP. Prior to 1.1.3, the utcp-http plugin is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. register_manual() validates the discovery URL against an HTTPS / loopback allowlist, but call_tool() and call_tool_streaming() reuse the resolved tool_call_template.url directly without revalidating, and the OpenAPI converter 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 OpenAPI converter then produces tools whose URL points at internal services on the agent host. All three HTTP-class protocols (utcp_http.http, utcp_http.streamable_http, utcp_http.sse) shared the same gap. This vulnerability is fixed in 1.1.3.
Severity: 4.7 | MEDIUM
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