CVE-2026-81849

HIGH 8.8

Path traversal in the aws:downloadContent plugin in amazon-ssm-agent

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Improper limitation of a pathname to a restricted directory in the aws:downloadContent plugin in amazon-ssm-agent before 3.3.4515.0 might allow an authenticated remote user whose ssm:SendCommand permission is restricted to the AWS-DownloadContent document, to write arbitrary files outside the intended download directory with root privileges, via crafted object keys in the S3 source the document is directed to retrieve. This issue may lead to arbitrary code execution as root if specific sensitive files are overwritten. To remediate this issue, customers should upgrade amazon-ssm-agent to version 3.3.4515.0 or later.

CWE	CWE-23
Vendor	amazon
Product	amazon-ssm-agent
Published	Aug 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

amazon / amazon-ssm-agent

0 < 3.3.4515.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/aws/amazon-ssm-agent/releases/tag/3.3.4515.0 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-091-aws/