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VULNERABILITIES

CVE-2026-122193 Details

Description

OS command injection in the example SSM document provisioning script in Trusted Remote Execution (REX) before 2026-07-28 might allow an authenticated remote user who is permitted to invoke the Rex-RO or Rex-RW SSM document to execute arbitrary commands as root on the managed instance, bypassing Cedar policy enforcement. To remediate this issue, users should delete any Rex-RO and Rex-RW SSM documents created from the example script, in each account and Region where it was run.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:9.9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-173-aws/ AMZN
https://github.com/trusted-remote-execution/trusted-remote-execution/security/advisories/GHSA-95g5-m242-wvhr AMZN

Weakness Enumeration

CWE-IDCWE NameSource
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')AMZN

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-122193
NVD Published Date:
Nov 6, 2026
NVD Last Modified:
Nov 6, 2026
Source:
AMZN
CVE-2026-122193 Details - Not Deferred