CVE-2026-116635

Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server

Assigner: AMZN
Reserved: 26.10.2026 Published: 02.11.2026 Updated: 02.11.2026

Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server (aws-serverless-mcp-server) before v0.2.1 might allow an actor who can influence the MCP agent to read the contents of JSON files outside the intended deployment status directory. Where write access has been enabled, to create or overwrite JSON files outside that directory. This issue is reachable through directory traversal sequences or an absolute path supplied in the project name input.

To remediate this issue, users should upgrade to version v0.2.1.

Metrics

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
CVSS Score: 6.1

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	AWS
Product	aws-serverless-mcp-server
Versions	Default: unaffected affected from 0 to 0.2.1 (excl.)

Vendor

AWS

Product

aws-serverless-mcp-server

Versions

Default: unaffected

affected from 0 to 0.2.1 (excl.)

References

Problem Types

CWE-23 Relative path traversal CWE
CWE-36 Absolute path traversal CWE

Impacts