CVE-2026-7461: Improper neutralization of inputs used in an OS command in the FSx Windows File Server volume mounting compone

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HIGH 7.2WATCHLISTUPGRADE

CVE-2026-7461 is a high-severity flaw (CVSS 7.2) affecting amazon ecs container agent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-30
Last modified	2026-10-26

Publisher (CNA): AMZN · Vendor: amazon

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-30 19:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

amazon amazon ecs container agent UPGRADE

Affected: >= 1.47.0 and < 1.103.0

Fixed in: 1.103.0

Safe to downgrade to: a release before 1.47.0

1. Check installed version

apt-cache policy amazon-ecs-container-agent || rpm -q amazon-ecs-container-agent || amazon-ecs-container-agent --version

2. UPGRADE to 1.103.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade amazon-ecs-container-agent

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade amazon-ecs-container-agent

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.47.0 (Debian / Ubuntu)

apt-cache madison amazon-ecs-container-agent sudo apt install amazon-ecs-container-agent=<VERSION_BEFORE_1.47.0> sudo apt-mark hold amazon-ecs-container-agent

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list amazon-ecs-container-agent sudo dnf downgrade amazon-ecs-container-agent-<VERSION_BEFORE_1.47.0> sudo dnf versionlock add amazon-ecs-container-agent

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-7461?

amazon ecs container agent: upgrade to 1.103.0. Exact commands for each OS are on this page.

Is CVE-2026-7461 being exploited?

CVE-2026-7461 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-7461 affect?

CVE-2026-7461 affects amazon ecs container agent. Severity is high (CVSS 7.2). 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

How urgent is CVE-2026-7461?

Priority 42/100. High severity; On your watchlist

Software pages

Windows vulnerabilities

References

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