SSRF in Universal-Tool-Calling-Protocol Python-Utcp
CVE-2026-101060
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA… (vendor-advisory)
- www.vulncheck.com/advisories/python-utcp-before-1.1.4-ssrf-via-unvalidated-http… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101060?
- CVE-2026-101060 is a high-severity vulnerability in Universal-Tool-Calling-Protocol Python-Utcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.2/10. Published 2026-09-27.
- How severe is CVE-2026-101060?
- High severity. CVSS v3 base score is 8.2 out of 10.