# CVE-2026-116635: AWS Serverless MCP Server path traversal in deployment status

Source: https://junglewise.ai/threats/cve-2026-116635-improper-limitation-of-a-pathname-to-a-restricted-directory-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-116635 · Severity: high · CVSS 6.1 · Published 2026-11-02

AWS Serverless MCP Server is a tool that helps developers build serverless applications using AI assistance. A path traversal flaw allows attackers who can control the MCP agent to read JSON files outside the intended deployment directory, and potentially create or modify files elsewhere on the system if write access is enabled.

Technologies: [Amazon AWS](https://junglewise.ai/threats/technologies/aws). Vendors: [Amazon](https://junglewise.ai/threats/vendors/amazon).

## Quick answers

**Is CVE-2026-116635 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116635 being exploited in the wild.

**How severe is CVE-2026-116635?** High severity, with a CVSS score of 6.1, published 2 November 2026.

**Which products and versions are affected?** AWS Labs Serverless MCP Server < v0.2.1.

**Is there a fix for CVE-2026-116635?** Yes: fixed in v0.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116635 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-116635?** Check whether you run Amazon AWS or AWS Labs Serverless MCP Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in v0.2.1

## Technical details

A path traversal vulnerability exists in the deployment status component due to improper pathname validation. An attacker can supply directory traversal sequences or absolute paths in the project name input to access files outside the restricted directory. The vulnerability affects JSON file operations (read and write where enabled) and is reachable through direct agent manipulation.

## Affected products

- AWS Labs Serverless MCP Server < v0.2.1

## Timeline

- 2026-11-02: disclosed

## References

- [https://aws.amazon.com/security/security-bulletins/rss/2026-164-aws/](https://aws.amazon.com/security/security-bulletins/rss/2026-164-aws/)

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