Amazon ECS Container Agent (Windows) is vulnerable to Information Disclosure

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.2 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary Amazon Elastic Container Service (Amazon ECS) is a fully managed container orchestration service that enables customers to deploy, manage, and scale containerized applications. An issue exists where, under certain circumstances, improper input validation in the FSx Windows File Server volume mounting process allows command injection through specially crafted credentials. Impact Improper neutralization of inputs used in an OS command in the FSx Windows File Server volume mounting component in Amazon ECS Agent on Windows before 1.103.0 might allow a remote authenticated threat actor to execute shell commands with SYSTEM privileges on the underlying host via a specially crafted username field in an ECS task definition. This issue requires permissions to register ECS task definitions or write to the Secrets Manager or SSM Parameter Store credentials used by the FSx volume configuration. To remediate this issue, users should upgrade to version 1.103.0. Impacted versions: Version…

Published by the source

7 May 2026, 01:22 UTC

Last modified by the source

7 May 2026, 01:22 UTC

Source last checked

26 Oct 2026, 15:20 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-fc67-c4hg-q653

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# Patch Next advisory brief: GHSA-fc67-c4hg-q653

Advisory: Amazon ECS Container Agent (Windows) is vulnerable to Information Disclosure
IDs: GHSA-fc67-c4hg-q653
Record: https://patchnext.com/advisories/ghsa-fc67-c4hg-q653 (revision 1, source checked 26 Oct 2026, 15:20 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/aws/amazon-ecs-agent 1.103.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/aws/amazon-ecs-agent: affected >= 1.47.0, <= 1.102.2; fixed in 1.103.0

## Suggested inspection (read-only)
- Go github.com/aws/amazon-ecs-agent: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/aws/amazon-ecs-agent.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-fc67-c4hg-q653 (GitHub-reviewed advisory GHSA-fc67-c4hg-q653 lists affected ranges: Go github.com/aws/amazon-ecs-agent >=1.47.0 <=1.102.2)

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