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CVE-2026-44284

FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execution

Published: May 8, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-918
6.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 85.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

FastGPT is an AI Agent building platform. Prior to version 4.14.17, FastGPT had an inconsistent SSRF protection gap in MCP tool URL handling. The direct MCP preview/run endpoints already rejected internal/private network URLs, but the MCP tool create/update endpoints could still save an internal MCP server URL. That stored URL could later be used by workflow execution without revalidating the destination. An authenticated user with permission to create or manage MCP toolsets could store an internal endpoint such as http://localhost:3000/mcp and later cause the FastGPT backend workflow runner to connect to that internal destination. This issue has been patched in version 4.14.17.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-918

Affected Products

labring
commercial
FastGPTSaaS
AI / ML / llm-serving-inference

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/labring/FastGPT/commit/c1c6b9520d976d25ed945b5bc4e0768149e6db69
github.com
https://github.com/labring/FastGPT/pull/6826
github.com
https://github.com/labring/FastGPT/releases/tag/v4.14.17
github.com
and 1 more references View all →

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