Information Disclosure in Amazon ECS Container AgentGHSA-wm7x-ww72-r77q
MEDIUMGHSA-wm7x-ww72-r77q is a medium-severity (CVSS 4.3) CWE-277 vulnerability in github.com/aws/amazon-ecs-agent. A fix is available for github.com/aws/amazon-ecs-agent — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-wm7x-ww72-r77q.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/aws/amazon-ecs-agentReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Summary Amazon Elastic Container Service (Amazon ECS) is a fully managed container orchestration service that enables customers to deploy, manage, and scale containerized applications. Amazon ECS container agent provides an introspection API that provides information about the overall state of the Amazon ECS agent and the container instances.
We identified CVE-2025-9039, an issue in the Amazon ECS agent.
Impact Under certain conditions, this issue could allow an introspection server to be accessed off-host by another instance if the instances are in the same security group or if their security groups allow incoming connections that include the port where the server is hosted. This issue does not affect instances where the option to allow off-host access to the introspection server is set to 'false'.
Impacted versions: version 0.0.3 through 1.97.0
Patches This issue has been addressed in ECS agent version 1.97.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
Workarounds Customers who cannot update to the latest AMI can modify the Amazon EC2 security groups to restrict incoming access to the introspection server port (51678).
References If you have any questions or comments about this advisory, we ask that you contact AWS Security via our vulnerability reporting page or directly via email to [email protected]. Please do not create a public GitHub issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/aws/amazon-ecs-agent | ≥ 0.0.3&&< 1.97.1 | 1.97.1go get github.com/aws/amazon-ecs-agent@v1.97.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/aws/amazon-ecs-agent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/aws/amazon-ecs-agent to 1.97.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wm7x-ww72-r77q is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-wm7x-ww72-r77q in your dependencies?
Find it across Go, including transitive dependencies.