labring FastGPT up to 4.14.16 URL server-side request forgery

Summaryinfo

A vulnerability marked as critical has been reported in labring FastGPT up to 4.14.16. This impacts an unknown function of the component URL Handler. Performing a manipulation results in server-side request forgery. This vulnerability is known as CVE-2026-44284. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in labring FastGPT up to 4.14.16. This affects an unknown code of the component URL Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-44284 since 05/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.14.17 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c1c6b9520d976d25ed945b5bc4e0768149e6db69 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• labring

Name

• FastGPT

Version

• 4.14.0
• 4.14.1
• 4.14.2
• 4.14.3
• 4.14.4
• 4.14.5
• 4.14.6
• 4.14.7
• 4.14.8
• 4.14.9
• 4.14.10
• 4.14.11
• 4.14.12
• 4.14.13
• 4.14.14
• 4.14.15
• 4.14.16

License

• open-source

Website

• Product: https://github.com/labring/FastGPT/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion