CVE-2026-34163 | labring FastGPT up to 4.14.7 getTools isInternalAddress server-side request forgery

VDB-354405 · CVE-2026-34163 · GCVE-0-2026-34163 LABRING FASTGPT UP TO 4.14.7 GETTOOLS ISINTERNALADDRESS SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.8 $0-$5k 1.86+ Summaryinfo A vulnerability identified as critical has been detected in labring FastGPT. The impacted element is the function isInternalAddress of the file /api/core/app/mcpTools/getTools. Performing a manipulation results in server-side request forgery. This vulnerability is known as CVE-2026-34163. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, was found in labring FastGPT. This affects the function isInternalAddress of the file /api/core/app/mcpTools/getTools. 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 4.14.9.5, 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. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-34163 since 03/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. Upgrading to version 4.14.9.5 eliminates this vulnerability. Productinfo Vendor labring Name FastGPT Version 4.9.0 4.9.11 4.9.12 4.11.1 4.14.5-fi 4.14.7 Website Product: https://github.com/labring/FastGPT/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.0 VulDB Meta Temp Score: 6.8 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.7 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: FastGPT 4.14.9.5 Timelineinfo 03/25/2026 CVE reserved 03/31/2026 +5 days Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-34163 (🔒) GCVE (CVE): GCVE-0-2026-34163 GCVE (VulDB): GCVE-100-354405 Entryinfo Created: 03/31/2026 17:05 Changes: 03/31/2026 17:05 (65) Complete: 🔍 Cache ID: 99:A09:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸