CVE-2026-7461

OS Command Injection in Amazon ECS Agent via FSx Windows File Server Volume Credentials

State: Published
Severity: 7.5 High
Published: Apr 30, 2026
Updated: May 1, 2026
Reserved: Apr 29, 2026

Description

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 version 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.

Scores

CVSS	Score	Vector	Source
4.0	7.5 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	AMZN
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	AMZN

Weaknesses

CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

Affected Products

Product	Versions
Amazon ECS AgentAWS	1.47.0 through 1.102.0Affected

References

https://github.com/aws/amazon-ecs-agent/releases/tag/v1.103.0patch
https://aws.amazon.com/security/security-bulletins/2026-024-aws/vendor-advisory
https://github.com/aws/amazon-ecs-agent/security/advisories/GHSA-fc67-c4hg-q653third-party-advisory

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