OS Command Injection in github.com/aws/amazon-ecs-agent (CVE-2026-7461)
Summary
OS command injection in github.com/aws/amazon-ecs-agent (CVE-2026-7461). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.103.0 or later.
Original description
The description as published by the source.
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.
Source: AWS Security Bulletins NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-7461 has been found in github.com/aws/amazon-ecs-agent.
Successful exploitation can lead to full system takeover.
What to do: upgrade github.com/aws/amazon-ecs-agent to 1.103.0 or later.
If unsure, ask your IT team or search "github.com/aws/amazon-ecs-agent CVE-2026-7461" on the vendor's site.
CVE-2026-7461 (github.com/aws/amazon-ecs-agent) — CWE-78
Attack vector: remote (network-reachable) / no user interaction
Patched: 1.103.0 — apply immediately
Workaround: Customers who cannot update to the latest AMI can restrict ecs:RegisterTaskDefinition permissions to trusted IAM principals only and restrict write access to Secrets Manager secrets referenced in FSx volume configurations.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
OS command injection (CWE-78) exists in github.com/aws/amazon-ecs-agent.
Check the vendor advisory for the affected versions of github.com/aws/amazon-ecs-agent.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 1.103.0.
Workaround: Customers who cannot update to the latest AMI can restrict ecs:RegisterTaskDefinition permissions to trusted IAM principals only and restrict write access to Secrets Manager secrets referenced in FSx volume configurations.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/aws/amazon-ecs-agent' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/aws/amazon-ecs-agent' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/aws/amazon-ecs-agentを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Customers who cannot update to the latest AMI can restrict ecs:RegisterTaskDefinition permissions to trusted IAM principals only and restrict write access to Secrets Manager secrets referenced in FSx volume configurations.パッチが適用されるまでの応急処置として、Customers who cannot update to the latest AMI can restrict ecs:RegisterTaskDefinition permissions to trusted IAM principals only and restrict write access to Secrets Manager secrets referenced in FSx volume configurations. を実施。回避策の副作用 (機能低下) を確認した上で。
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3Apply patch patch
Upgrade github.com/aws/amazon-ecs-agent to 1.103.0ステージング環境で 1.103.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory aws.amazon.com
- advisory github.com
- advisory nvd.nist.gov
- AWS aws.amazon.com
- package github.com
- patch github.com