{"id":"CVE-2026-115845","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115845","generatedAt":"2026-10-28T01:02:33.400Z","title":"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.","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.\n\n\n\nAWS fixed this issue service-side. No customer action is required.","published":"2026-10-23T19:17:45.000Z","lastModified":"2026-10-23T19:23:01.000Z","status":"Awaiting Analysis","sourceIdentifier":"ff89ba41-3aa1-4d27-914a-91399e9639e5","cvss":{"version":"4.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-184"],"affected":[],"epss":{"score":0.00306,"percentile":0.23165,"date":"2026-10-26","history":[{"date":"2026-10-24","score":0.0038,"percentile":0.3085}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-23T19:17:45.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-23T19:17:44.643Z"},"summary":"New CVE, medium severity (CVSS 5.3)."}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-149-aws/","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115845","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}