{"data":{"id":"af5ce664-25db-4e45-bc54-f52988629e87","title":"CVE-2026-18953 - Improper limitation of a pathname in AWS Transform MCP Server","summary":"CVE-2026-18953 is an improper limitation of a pathname to a restricted directory in the get_resource tool of awslabs.aws-transform-mcp-server, a locally run MCP server, in versions 0.1.0 through 0.1.4. A context-dependent actor can use the savePath parameter to write arbitrary files outside the intended working directory, which could lead to local code execution.","solution":"Fixed in 0.1.5 (the source states the flaw is present before 0.1.5).","labels":["security"],"sourceUrl":"https://aws.amazon.com/security/security-bulletins/rss/2026-075-aws/","publishedAt":"2026-08-05T20:46:20.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"high","attackType":["other"],"issueType":"vulnerability","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":["Amazon"],"affectedVendorsRaw":["AWS Transform MCP Server","Model Context Protocol (MCP)"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-08-05T20:46:20.000Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity","availability"],"aiComponentTargeted":"plugin","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null,"fixes":[]}}