What is CVE-2026-45369?

CVE-2026-45369 is a high-severity vulnerability in Universal-tool-calling-protocol Python-utcp, classified under OS Command Injection. CVSS score: 8.3/10. Published 2026-05-14.

How severe is CVE-2026-45369?

High severity. CVSS v3 base score is 8.3 out of 10.

RCE in Universal-tool-calling-protocol Python-utcp

CVE-2026-45369

python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or es…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

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

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45369?: CVE-2026-45369 is a high-severity vulnerability in Universal-tool-calling-protocol Python-utcp, classified under OS Command Injection. CVSS score: 8.3/10. Published 2026-05-14.
How severe is CVE-2026-45369?: High severity. CVSS v3 base score is 8.3 out of 10.