CVE-2026-42343Public exploitNetwork attack vector

Service interruption via sandbox worker exhaustion

Published May 8, 2026 · Updated May 8, 2026

Uncontrolled resource consumption in Labring FastGPT 4.14.13 and earlier allows remote attackers to interrupt service via crafted sandbox jobs. The code-sandbox worker pool checks memory only every 500ms and accepts concurrent CPU-bound jobs without hard container CPU or RAM limits. Infinite-loop jobs can occupy all five workers and time out legitimate requests, while transient allocations can evade the polling window.

CVSS severity6.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Labring FastGPT 4.14.13 and earlier allows remote attackers to interrupt service via crafted sandbox jobs. The code-sandbox worker pool checks memory only every 500ms and accepts concurrent CPU-bound jobs without hard container CPU or RAM limits. Infinite-loop jobs can occupy all five workers and time out legitimate requests, while transient allocations can evade the polling window.

The record

CVE
CVE-2026-42343
Published
May 8, 2026
Updated
May 8, 2026
Vendor
Labring
Product
FastGPT
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 4.14.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Labring · FastGPTversion=<= 4.14.13

Published CVSS scores

6.3GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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