What is CVE-2026-115845?

CVE-2026-115845 is a medium-severity vulnerability in AWS Mcp Server, classified under Incomplete List of Disallowed Inputs. CVSS score: 6.4/10. Published 2026-10-23.

How severe is CVE-2026-115845?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in AWS Mcp Server

CVE-2026-115845

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.

Published 2026-10-23 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

AWS Mcp Server

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)

Frequently asked questions

What is CVE-2026-115845?: CVE-2026-115845 is a medium-severity vulnerability in AWS Mcp Server, classified under Incomplete List of Disallowed Inputs. CVSS score: 6.4/10. Published 2026-10-23.
How severe is CVE-2026-115845?: Medium severity. CVSS v3 base score is 6.4 out of 10.