CVE-2026-97662 AWS CVE debrief

Who should care

Defenders responsible for AWS security-agent-mcp-server systems should assess exposure and prioritize upgrading to version 0.2.0. They should also review and update affected systems, monitor for potential exploitation attempts, and verify the full scope of affected systems and potential impact. Defenders should be aware of the potential for arbitrary file creation, overwrite, and truncation outside the intended workspace directory and take necessary steps.

Why it matters

CVE-2026-97662 is a high-severity vulnerability in AWS security-agent-mcp-server that requires immediate attention from defenders. The vulnerability allows for arbitrary file creation, overwrite, and truncation outside the intended workspace directory, potentially impacting system integrity and confidentiality. Defenders should assess exposure, prioritize upgrading to version 0.2.0, and monitor for potential exploitation attempts. Evidence is limited to the CVE record and source item, and further verification is needed to determine the full scope of affected systems and potential impact.

• Potential for arbitrary file creation, overwrite, and truncation outside the intended workspace directory
• Need to verify affected systems and upgrade to version 0.2.0
• Possible impact on system integrity and confidentiality

Technical summary

An argument injection issue in the diff scan operation in AWS security-agent-mcp-server before version 0.2.0 might allow context-dependent threat actors to create, overwrite, or truncate arbitrary files on the host outside the intended workspace directory via a crafted reference value supplied to the diff scan operation. The issue requires immediate attention from defenders, and upgrading to version 0.2.0 is recommended to remediate the vulnerability. The vulnerability has a high severity score and could impact system integrity and confidentiality.

Defensive priority

Upgrade to version 0.2.0 to remediate the argument injection issue

Recommended defensive actions

• Upgrade to version 0.2.0
• Review and update affected systems
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the argument injection issue in AWS security-agent-mcp-server before version 0.2.0. Evidence is limited to these sources, and defenders should verify affected systems and upgrade to version 0.2.0. Further verification is needed to determine the full scope of affected systems and potential impact. The issue allows for arbitrary file creation, overwrite, and truncation outside the intended workspace directory.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.