What’s Vulnerable › Vulnerabilities

CVE-2026-7461: OS Command Injection in Amazon ECS Agent via FSx Windows File Server Volume Credentials

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-30 · updated 2026-10-26
• Weakness: CWE-78

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.

Affected products

• AWS Amazon ECS Agent: from 1.47.0 before 1.103.0 — fixed in 1.103.0

How to fix

Upgrade to a fixed version: AWS Amazon ECS Agent 1.103.0. Check the vendor advisory for mitigations.

References

• https://aws.amazon.com/security/security-bulletins/2026-024-aws/
• https://github.com/aws/amazon-ecs-agent/releases/tag/v1.103.0
• https://github.com/aws/amazon-ecs-agent/security/advisories/GHSA-fc67-c4hg-q653

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