CVE-2026-53957
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.7
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- EPSS probability
- 0.25%
- CWE
- CWE-918
- Published
- 2026-09-15
- Last modified
- 2026-09-15
Affected products
- contentful contentful-mcp-server
- @contentful mcp-server
- @contentful mcp-tools
Weakness type
Related vulnerabilities
- CVE-2026-83548 — A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended altern
- CVE-2026-87595 — Server-side request forgery in Mobile in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging socia
- CVE-2026-66842 — BIG-IP and BIG-IQ Configuration utility vulnerability
- CVE-2026-92808 — Server-Side Request Forgery in Altium Enterprise Server UnifiedLogin Service Allows Unauthenticated System Compromise
- CVE-2026-75754 — Missing Authentication for Critical Function, Server-Side Request Forgery (SSRF), and Use of Hard-coded Credentials in A
- CVE-2026-61559 — @zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery
- CVE-2026-12944 — Incomplete Security Scanner Blocklist Enables Network-Based Code Execution
- CVE-2026-86123 — SQL Chat Unauthenticated Database-Connection Proxy in the /api/connection Endpoints