Server-Side Request Forgery in Universal Tool Calling Protocol Products
CVE-2026-101061

2.3LOW

Key Information:

Vendor

Universal-tool-calling-protocol

Status
Python-utcp
Vendor
CVE Published:
27 September 2026

What is CVE-2026-101061?

The Universal Tool Calling Protocol (UTCP) products, namely utcp-gql and utcp-websocket, exhibit critical vulnerabilities due to ineffective application of security measures aimed at preventing server-side request forgery (SSRF). These vulnerabilities allow attackers to exploit the system by manipulating URL inputs to bypass validation checks. As a result, malicious users can force connections to internal services, gaining unauthorized access to sensitive data such as API keys and OAuth tokens. This poses significant security risks as attackers can redirect traffic and exploit cloud metadata endpoints, ultimately compromising internal systems.

Affected Version(s)

python-utcp 0 < 1.1.1

python-utcp 0 < 1.1.1

python-utcp 1.1.1

References

https://github.com/universal-tool-calling-protocol/python...
vendor-advisory
https://www.vulncheck.com/advisories/utcp-gql-and-utcp-we...
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hariantara
.