CVE Catalog

CVE-2026-115845

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.31%

23th percentile - higher than 23% of all known CVEs

Summary

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.

Risk Assessment

An authenticated user could execute arbitrary code within their isolated session environment, potentially compromising data confidentiality or integrity within that session. Due to environment isolation, the risk to other customers is limited.

Recommendation

No customer action is required as AWS fixed the issue service-side. However, it is advisable to monitor AWS security bulletins to confirm the fix has been applied.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS