9.9 CriticalCWE-918
CVE-2026-89049
AWS Amazon SSM Agent vulnerability
AWSAmazon SSM Agent
Status
- Not in CISA KEV
- Fixed in version 3.3.4851.0
Exploit probabilityEPSSchecked 25 Oct
0.7%probability of exploitation in the next 30 days
Higher than 51% of scored CVEs
SeverityCVSS
9.9Critical
Description NVD
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.
Coverage 1 article · 1 outlet
- Amazon Patches Critical SSM Flaw Exposing AWS Instance CredentialsSecurityOnline · first in our coverage