CVE-2026-115845 — MEDIUM (6.4)

Vulnerability Description

An incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to execute arbitrary code within their own isolated session environment via a crafted script. AWS fixed this issue service-side. No customer action is required.

CVSS Score

6.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-184

References

https://aws.amazon.com/security/security-bulletins/2026-149-aws/

FAQ

What is CVE-2026-115845?

CVE-2026-115845 is a vulnerability with a CVSS score of 6.4 (MEDIUM). An incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to execute arbitrary code within their own isolat...

How severe is CVE-2026-115845?

CVE-2026-115845 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-115845?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.