CVE-2026-34163

HIGH EPSS 20.0%
Published Mar 31, 20263mo ago · Modified Jun 17, 20261w ago
7.7 CVSS 3.1
High
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.

CVSS Details

Base Score
7.7
Exploitability
3.1
Impact
4.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
20.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 1

VendorProductVersionRange
fastgptfastgpt* <4.14.9.5

References 4

  • github.com https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00
    Patch
  • github.com https://github.com/labring/FastGPT/pull/6640
    Issue TrackingPatch
  • github.com https://github.com/labring/FastGPT/releases/tag/v4.14.9.5
    ProductRelease Notes
  • github.com https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv
    ExploitMitigationVendor Advisory

Remediation

  • github.com https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00
    Patch
  • github.com https://github.com/labring/FastGPT/pull/6640
    Issue TrackingPatch