Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-42343— FastGPT: Uncontrolled Resource Consumption leading to Sandbox Exhaustion

Quick assessment

Affected
labring FastGPT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.14.13及之前版本存在资源管理错误漏洞，该漏洞源于code-sandbox组件资源隔离不足和资源消耗不受控制，可能导致攻击者绕过内存检查或耗尽JavaScript工作线程池。

AI Predicted 7.5 Difficulty: Easy EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
labring FastGPT <= 4.14.13 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-42343

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
FastGPT: Uncontrolled Resource Consumption leading to Sandbox Exhaustion
Source: CVE Program / CVE List V5
Vulnerability Description
FastGPT is an AI Agent building platform. In versions 4.14.13 and prior, the code-sandbox component suffers from insufficient resource isolation and uncontrolled resource consumption. The service relies solely on an application-level soft limit (a 500ms polling interval) for memory management and lacks strict OS-level constraints such as cgroups or kernel-level namespaces. This architectural weakness allows attackers to easily bypass memory checks via time-window attacks, or exhaust the entire JavaScript worker pool via concurrent CPU-intensive requests, resulting in a complete Denial of Service (DoS) for legitimate users. At time of publication, there are no publicly available patches.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
FastGPT 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.14.13及之前版本存在资源管理错误漏洞，该漏洞源于code-sandbox组件资源隔离不足和资源消耗不受控制，可能导致攻击者绕过内存检查或耗尽JavaScript工作线程池。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
labring FastGPT <= 4.14.13 -

II. Public POCs for CVE-2026-42343

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-42343

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-42343 (1)

Same Patch Batch · labring · 2026-05-08 · 6 CVEs total

CVE-2026-42302 9.8 CRITICAL FastGPT: Unauthenticated Remote Code Execution (RCE) via code-server Misconfiguration in a
CVE-2026-42345 7.7 HIGH FastGPT: Cloud metadata endpoint SSRF protection bypass via port specification, IPv6 mappi
CVE-2026-42344 6.3 MEDIUM FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress allows SSRF on all protected end
CVE-2026-44284 6.3 MEDIUM FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execution
CVE-2026-44286 FastGPT: SSRF Vulnerability in Laf Workflow Node via Missing Internal Address Validation

IV. Related Vulnerabilities

Same product: FastGPT
Same vendor: labring
Same weakness: CWE-400

V. Comments for CVE-2026-42343

No comments yet

Leave a comment