What is CVE-2026-45370?

CVE-2026-45370 is a high-severity vulnerability in Universal-tool-calling-protocol Python-utcp, classified under CWE-526. CVSS score: 7.7/10. Published 2026-05-14.

How severe is CVE-2026-45370?

High severity. CVSS v3 base score is 7.7 out of 10.

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

CVE-2026-45370

python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_protocol.py passes a full copy of os.environ to every CLI subprocess. When combined with CVE-2026-45369, an attacker can exfiltra…

EPSS: 0.000 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

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

Weakness classification (CWE)

CWE-526

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45370?: CVE-2026-45370 is a high-severity vulnerability in Universal-tool-calling-protocol Python-utcp, classified under CWE-526. CVSS score: 7.7/10. Published 2026-05-14.
How severe is CVE-2026-45370?: High severity. CVSS v3 base score is 7.7 out of 10.