CVE-2026-53957
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
Vulnerability in Contentful MCP Server before versions 1.7.19 and 0.4.5. export_space and import_space expose host, proxy, rawProxy, and insecure network options to LLM-controlled tool arguments and combine them with CONTENTFUL_MANAGEMENT_TOKEN. After enabling migration tools, a direct MCP call or prompt injection can redirect API requests and Authorization header to an attacker-controlled host.
Risk Assessment
Exposure of the personal access token permits persistent out-of-band access to every Contentful space within the token's scope, leading to data breach and integrity loss.
Recommendation
Update @contentful/mcp-server to 1.7.19 and @contentful/mcp-tools to 0.4.5, and consider restricting the invocation of migration tools.
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Original NVD description (English source)
Contentful MCP Server is a Model Context Protocol server for the Contentful Management API. Prior to @contentful/mcp-server 1.7.19 and @contentful/mcp-tools 0.4.5, export_space and import_space in packages/mcp-tools/src/tools/jobs/space-to-space-migration/exportSpace.ts and packages/mcp-tools/src/tools/jobs/space-to-space-migration/importSpace.ts expose host, proxy, rawProxy, and insecure network options to LLM-controlled tool arguments and combine those options with the server's CONTENTFUL_MANAGEMENT_TOKEN. After space_to_space_migration_handler enables the migration tools, a direct MCP call or prompt injection through attacker-controlled Contentful content can redirect Contentful Management API requests and their Authorization header to an attacker-controlled host or proxy. The regular tools that use createToolClient are unaffected because those tools pin the host from server configuration. Exposure of the personal access token permits persistent out-of-band access to every Contentful space within the token's scope. This issue is fixed in @contentful/mcp-server 1.7.19 and @contentful/mcp-tools 0.4.5.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

