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

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r
https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r

Configurations

No configuration.

History

26 Oct 2026, 14:10

Type	Values Removed	Values Added
Summary		(es) python-utcp es la implementación en Python de UTCP. Antes de la versión 1.1.3, _prepare_environment() en cli_communication_protocol.py pasa una copia completa de os.environ a cada subproceso CLI. Cuando se combina con CVE-2026-45369, un atacante puede exfiltrar todos los secretos a nivel de proceso en una sola llamada a la herramienta. Esta vulnerabilidad se corrige en la versión 1.1.3.

Information

Published : 2026-05-14 21:16

Updated : 2026-10-26 14:10

NVD link : CVE-2026-45370

Mitre link : CVE-2026-45370

CVE.ORG link : CVE-2026-45370

JSON object : View

Products Affected

No product.

CWE

CWE-526

Cleartext Storage of Sensitive Information in an Environment Variable

{"id": "CVE-2026-45370", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45370", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-15T11:23:35.354622Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "universal-tool-calling-protocol", "product": "python-utcp", "versions": [{"status": "affected", "version": "< 1.1.2"}]}]}], "published": "2026-05-14T21:16:48.350", "references": [{"url": "https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r", "source": "security-advisories@github.com"}, {"url": "https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-526"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "python-utcp es la implementaci\u00f3n en Python de UTCP. Antes de la versi\u00f3n 1.1.3, _prepare_environment() en cli_communication_protocol.py pasa una copia completa de os.environ a cada subproceso CLI. Cuando se combina con CVE-2026-45369, un atacante puede exfiltrar todos los secretos a nivel de proceso en una sola llamada a la herramienta. Esta vulnerabilidad se corrige en la versi\u00f3n 1.1.3."}], "lastModified": "2026-10-26T14:10:00.130", "sourceIdentifier": "security-advisories@github.com"}