OS Command Injection in Amazon ECS Agent via FSx Windows File Server Volume Credentials
Published Apr 30, 2026
7.5
HIGHCVSS 4.0
EPSS 0.81%
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
-
- Version 1.47.0StatusaffectedConstraints<=1.102.0
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| AWS | Amazon ECS Agent | unaffected |
|
- ≥ 1.47.0 · < 1.103.0
No data.
No Red Hat product state for this CVE.
github.com/aws/amazon-ecs-agent
Go
Introduced 1.47.0 Fixed 1.103.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/aws/amazon-ecs-agent | 1.47.0 | 1.103.0 |
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Apr 30, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.81% (0.00807) | 55.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.55% (0.00547) | 41.30th | v5 (v2026.06.15) |
| May 1, 2026 | 0.03% (0.00028) | 7.83th | v4 (v2025.03.14) |
References (3)
- https://aws.amazon.com/security/security-bulletins/2026-024-aws/ vendor-advisoryVendor Advisory
- https://github.com/aws/amazon-ecs-agent/releases/tag/v1.103.0 patchRelease Notes
- https://github.com/aws/amazon-ecs-agent/security/advisories/GHSA-fc67-c4hg-q653 third-party-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-024-aws/ | vendor-advisoryVendor Advisory | |
| https://github.com/aws/amazon-ecs-agent/releases/tag/v1.103.0 | patchRelease Notes | |
| https://github.com/aws/amazon-ecs-agent/security/advisories/GHSA-fc67-c4hg-q653 | third-party-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.