{
  "version": "https://jsonfeed.org/version/1.1",
  "title": "AWS Trusted Remote Execution (REX) setup-guide example SSM documents allow OS command injection (CVE-2026-122193) · updates",
  "home_page_url": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193",
  "feed_url": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193/feed.json",
  "description": "On Nov 6 2026 AWS published Important bulletin 2026-173-AWS for CVE-2026-122193 (GHSA-95g5-m242-wvhr): an OS command injection issue in an example from the Trusted Remote Execution (REX) set-up documentation. The example script creates AWS Systems Manager documents Rex-RO and Rex-RW for running scripts on managed instances; due to how that example handled input parameters (including scriptArgs), a user permitted to invoke the SSM document could supply crafted input that runs unintended OS commands on the managed instance outside the REX sandbox. This is not a flaw in a shipped REX artifact — only operators who created those SSM documents by following the guide are affected. AWS removed the example from the guide. Mitigation: delete any Rex-RO / Rex-RW SSM documents created from the example in each account and Region where it was run. No workaround other than deleting the documents.",
  "language": "en",
  "_pwn": {
    "slug": "aws-rex-example-ssm-command-injection-cve-2026-122193",
    "severity": "high",
    "status": "live",
    "patchStatus": "patched",
    "rss": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193/feed.xml",
    "llms": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193/llms.txt",
    "json": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193.json"
  },
  "items": [
    {
      "id": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193#2026-11-06-e7dc2a0c",
      "url": "https://pwn.watch/i/aws-rex-example-ssm-command-injection-cve-2026-122193#2026-11-06-e7dc2a0c",
      "title": "AWS Trusted Remote Execution (REX) setup-guide example SSM documents allow OS command injection (CVE-2026-122193): AWS publishes Important bulletin 2026-173-AWS for CVE-2026-122193: OS command injection in REX set-up guide example SSM documents Rex-RO/Rex-RW; example removed from guide; delete created documents.",
      "content_text": "AWS Trusted Remote Execution (REX) setup-guide example SSM documents allow OS command injection (CVE-2026-122193): AWS publishes Important bulletin 2026-173-AWS for CVE-2026-122193: OS command injection in REX set-up guide example SSM documents Rex-RO/Rex-RW; example removed from guide; delete created documents.\n\nSource: https://aws.amazon.com/security/security-bulletins/2026-173-aws/",
      "date_published": "2026-11-06T00:00:00.000Z",
      "external_url": "https://aws.amazon.com/security/security-bulletins/2026-173-aws/",
      "tags": [
        "high"
      ]
    }
  ]
}