CVE-2026-89049 Affecting amazon-ssm-agent package, versions <0:3.3.5226.0-1.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Oct 2026
- disclosed10 Sept 2026
Introduced: 10 Sep 2026
NewCVE-2026-89049 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 amazon-ssm-agent to version 0:3.3.5226.0-1.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3149.
NVD Description
Note: Versions mentioned in the description apply only to the upstream amazon-ssm-agent package and not the amazon-ssm-agent package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
A server-side request forgery issue due to improper validation of equivalent address representations in the port forwarding to remote hosts functionality in Amazon AWS Systems Manager Agent (SSM Agent) before 3.3.4851.0 on all platforms might allow an authenticated remote user to bypass the remote destination denylist and reach link-local endpoints, potentially obtaining the temporary IAM role credentials of a managed instance and acting with that role's permissions from outside the instance, via a crafted destination host value that uses an alternate representation of a denied link-local address.
To remediate this issue, users should upgrade to version 3.3.4851.0 or later.