{"id":"CVE-2026-18953","aliases":["EUVD-2026-53583"],"status":"published","title":"Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server","description":"Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter.\n\n\n\nTo remediate this issue, users should upgrade to version 0.1.5 or later.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00183,"percentile":0.07961,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-22"],"published":"2026-08-05T19:33:10Z","modified":"2026-10-23T21:10:00Z","exploits":[{"source":"pocgithub","id":"ronamosa/CVE-2026-18953","title":"ronamosa/CVE-2026-18953","date":"2026-08-08","url":"https://github.com/ronamosa/CVE-2026-18953"}],"products":[{"vendor":"amazon","product":"aws_transform_mcp_server"},{"vendor":"aws","product":"aws-transform-mcp-server"}],"references":[{"url":"https://pypi.org/project/awslabs.aws-transform-mcp-server/0.1.5/","tags":["release-notes","patch","Product"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-075-aws/","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://github.com/awslabs/mcp/security/advisories/GHSA-66mr-jr63-2jgw","tags":["release-notes","Vendor Advisory"]}],"sources":{"cve":[{"id":"CVE-2026-18953","title":"Improper limitation of a pathname to a restricted directory in aws-transform-mcp-server","description":"Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter.\n\n\n\nTo remediate this issue, users should upgrade to version 0.1.5 or later.","status":"published","published":"2026-08-05T19:33:10.8Z","modified":"2026-08-06T14:51:50.363Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium","assessor":"cna"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-53583","description":"Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter.\n\n\n\nTo remediate this issue, users should upgrade to version 0.1.5 or later.","status":"published","published":"2026-08-05T19:33:10Z","modified":"2026-08-06T14:51:50Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium"}],"updated_at":"2026-11-02T18:02:08.553271Z"}],"nvd":[{"id":"CVE-2026-18953","description":"Improper limitation of a pathname to a restricted directory in the get_resource tool in Amazon awslabs.aws-transform-mcp-server 0.1.0 through 0.1.4 might allow a context-dependent actor to write arbitrary files outside the intended working directory via the savePath parameter.\n\n\n\nTo remediate this issue, users should upgrade to version 0.1.5 or later.","status":"published","published":"2026-08-05T20:17:07.77Z","modified":"2026-10-23T21:10:00.157Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:35.031043Z"}]}}