CVE-2026-45370CWE-526

python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

High · published May 14, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

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 exfiltrate all process-level secrets in a single tool call. This vulnerability is fixed in 1.1.3.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00371 · 29.9th percentile
Weakness
CWE-526 · Cleartext Storage of Sensitive Information in an Environment Variable
Published
2026-05-14T20:14Z
EPSS history
Timeline
  • 14 MAY 20:14Z
    python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
    cvelistv5