SSRF in Agentfront Frontmcp
CVE-2026-39885
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…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.003 (24.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Agentfront Frontmcp — versions < 1.0.4
- Agentfront \@Frontmcp\/adapters
- Agentfront \@Frontmcp\/sdk
- @Frontmcp Adapters — versions < 1.0.4
- @Frontmcp Sdk — versions < 1.0.4
- Frontmcp Mcp-from-openapi — versions < 2.3.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-39885?
- CVE-2026-39885 is a high-severity vulnerability in Agentfront Frontmcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2026-04-08.
- How severe is CVE-2026-39885?
- High severity. CVSS v3 base score is 7.5 out of 10.