CVE-2024-5979Public exploitNetwork attack vector

Server crash via reflected System.exit invocation

Published Jun 27, 2024 · Updated Oct 15, 2025

Denial of service in H2O.ai H2O-3 before 3.46.0.6 allows remote attackers to crash the server through the Rapids run_tool command. AstRunTool reflectively invokes tool main methods, and MojoConvertTool calls System.exit when supplied invalid arguments. The default open REST setup requires no authentication, and a crafted request terminates the H2O server process.

CVSS severity7.5
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in H2O.ai H2O-3 before 3.46.0.6 allows remote attackers to crash the server through the Rapids run_tool command. AstRunTool reflectively invokes tool main methods, and MojoConvertTool calls System.exit when supplied invalid arguments. The default open REST setup requires no authentication, and a crafted request terminates the H2O server process.

The record

CVE
CVE-2024-5979
Published
Jun 27, 2024
Updated
Oct 15, 2025
Vendor
H2O.ai
Product
H2O-3
Classifications
CWE-94, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2025Record 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=3.46.0
  2. Affected versionversion=unspecified <3.46.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

H2O.ai · H2O-3version=3.46.0; version=unspecified <3.46.0.6

Published CVSS scores

7.5huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-94Improper Control of Generation of Code ('Code Injection')
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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