{"id":"CVE-2026-115845","aliases":[],"cve":{"records":[{"id":"CVE-2026-115845","source":"AMZN","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-23T17:25:48.577Z","published":"2026-10-23T19:04:44.790Z","modified":"2026-11-02T13:46:34.164Z"}],"publishers":[{"name":"AMZN","role":"CNA","organizationId":"ff89ba41-3aa1-4d27-914a-91399e9639e5","modified":"2026-10-23T19:04:44.790Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-02T13:46:34.164Z"}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-149-aws/","tags":["vendor-advisory"],"source":"AMZN"}],"weaknesses":[{"id":"CWE-184","description":"CWE-184 Incomplete list of disallowed inputs","source":"AMZN"}],"applicability":[{"source":"AMZN","statements":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:aws:aws_mcp_server:n_a:*:*:*:*:*:*:*"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-02T13:42:40.406240Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Incomplete validation in the run_script Python sandbox in AWS MCP Server","titleSource":"AMZN","descriptionSource":"AMZN","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.","score":6.4,"severity":"medium","published":"2026-10-23T19:04:44.790Z","modified":"2026-11-02T13:46:34.164Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"AWS","name":"AWS MCP Server","platforms":[],"versions":[{"version":"N/A","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected","cpes":[],"source":"AMZN","url":"https://www.cve.org/CVERecord?id=CVE-2026-115845"}],"remediation":[],"references":["https://aws.amazon.com/security/security-bulletins/2026-149-aws/"],"sources":[{"name":"CVE","id":"CVE-2026-115845","modified":"2026-11-02T13:46:34.164Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-115845"}],"assessments":[{"source":"AMZN","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4},{"source":"AMZN","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","score":5.3}],"sourceAffected":[],"observedAt":"2026-11-02T13:55:52.830Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:10:34.932Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-02T14:00:55.427Z","attemptedAt":"2026-11-02T14:00:55.427Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-02T14:00:51.621Z","attemptedAt":"2026-11-02T14:00:51.621Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-02T14:00:52.231Z","attemptedAt":"2026-11-02T14:00:52.231Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-02T14:00:52.008Z","attemptedAt":"2026-11-02T14:00:52.008Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-jmwp-36mq-x645","url":"https://github.com/advisories/GHSA-jmwp-36mq-x645","modified":"2026-10-23T21:36:10Z","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","checkedAt":"2026-11-02T14:00:51.621Z"},{"source":"FIRST EPSS","id":"CVE-2026-115845","url":"https://www.first.org/epss/","probability":0.00306,"percentile":0.23408,"date":"2026-11-01","checkedAt":"2026-11-02T14:00:52.008Z"},{"source":"ENISA EUVD","id":"EUVD-2026-109127","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109127","modified":"Oct 23, 2026, 7:04:44 PM","score":5.3,"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","checkedAt":"2026-11-02T14:00:52.231Z"},{"source":"NVD","id":"CVE-2026-115845","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115845","modified":"2026-10-23T19:23:01.467","score":5.3,"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-02T14:00:55.427Z"},{"source":"NVD","id":"CVE-2026-115845","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115845","modified":"2026-10-23T19:23:01.467","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","checkedAt":"2026-11-02T14:00:55.427Z"}],"aiSummary":{"text":"AWS MCP Server has an incomplete validation issue, potentially allowing authenticated users to execute arbitrary code in their isolated session environment via a crafted script. The issue is reported in a custom version. AWS has fixed this service-side.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-02T13:56:08.025Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-115845"}]}}