PT-2026-39206 · Fastgpt · Fastgpt

Jinyimeng01 · Published 2026-05-08 · Updated 2026-05-12 · CVE-2026-42343

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions FastGPT versions prior to 4.14.13

Description The code-sandbox component in the AI Agent building platform has insufficient resource isolation and uncontrolled resource consumption. The service uses an application-level soft limit with a 500ms polling interval for memory management but lacks OS-level constraints like cgroups (control groups that limit, account for, and isolate resource usage) or kernel-level namespaces. This allows attackers to bypass memory checks using time-window attacks or exhaust the JavaScript worker pool through concurrent CPU-intensive requests, leading to a Denial of Service (DoS).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-42343

Affected Products

Fastgpt

References · 6

• 🔥 https://github.com/labring/FastGPT/security/advisories/GHSA-qv7v-r94x-6x3x · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-42343 · Security Note
• https://twitter.com/CVEnew/status/2053131424606343517 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2052939878204129302 · Twitter Post
• https://t.me/cveNotify/163165 · Telegram Post
• https://t.me/CVEtracker/53168 · Telegram Post