FastGPT: Uncontrolled Resource Consumption leading to Sandbox Exhaustion_CVE-2026-42343

6.3 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-42343

Source GitHub_M

Published May 8, 2026 at 22:09

Affected Product

Vendor labring

Product FastGPT

Version <= 4.14.13

Affected Versions labring FastGPT <= 4.14.13

CWE Classification

CWE-400

References

github.com /labring/FastGPT/security/advisories/GHSA-qv7v-r94x-6x3x

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