CVE-2026-39885FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP).
Updated under an hour ago ()
Does this affect you?
It affects agentfront @frontmcp/adapters and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP). Prior to 2.3.0, the mcp-from-openapi library uses @apidevtools/json-schema-ref-parser to dereference $ref pointers in OpenAPI specifications without configuring any URL restrictions or custom resolvers. A malicious OpenAPI specification containing $ref values pointing to internal network addresses, cloud metadata endpoints, or local files will cause the library to fetch those resources during the initialize() call. This enables Server-Side Request Forgery (SSRF) and local file read attacks when processing untrusted OpenAPI specifications. This vulnerability is fixed in 2.3.0.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
agentfront @frontmcp/adapters agentfront:@frontmcp/adapters | before 1.0.4 | NVD |
agentfront @frontmcp/sdk agentfront:@frontmcp/sdk | before 1.0.4 | NVD |
agentfront frontmcp agentfront:frontmcp | before 1.0.4 | NVD |
frontmcp mcp-from-openapi frontmcp:mcp-from-openapi | before 2.3.0 | NVD |
References
- https://github.com/agentfront/frontmcp/releases/tag/v1.0.4product
- https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxjexploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.