What is CVE-2026-45366?

CVE-2026-45366 is a medium-severity vulnerability in Universal-tool-calling-protocol Typescript-utcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.7/10. Published 2026-05-28.

How severe is CVE-2026-45366?

Medium severity. CVSS v3 base score is 4.7 out of 10.

SSRF in Universal-tool-calling-protocol Typescript-utcp

CVE-2026-45366

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 invocatio…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (8.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Universal-tool-calling-protocol Typescript-utcp — versions < 1.1.2

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45366?: CVE-2026-45366 is a medium-severity vulnerability in Universal-tool-calling-protocol Typescript-utcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.7/10. Published 2026-05-28.
How severe is CVE-2026-45366?: Medium severity. CVSS v3 base score is 4.7 out of 10.