CVE-2026-45366
CVE-2026-45366 · typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 4.7 · Medium · EPSS 0.1% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
typescript-utcp
- Versions
- < 1.1.2: Affected
No fix published
@utcp/http npm
- Affected ranges
- SEMVER: < 1.1.2
Update to 1.1.2