How severe is CVE-2024-5979?

CVE-2024-5979 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-5979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-5979?

CVE-2024-5979 affects H2o. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-5979?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-5979 have an EU (EUVD) identifier?

Yes. CVE-2024-5979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1927.

When was CVE-2024-5979 published?

CVE-2024-5979 was published on 2024-06-27 and last updated on 2026-06-17.

CVE-2024-5979

CVE-2024-5979 is a high-severity vulnerability in H2o with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1927
Weakness: CWE-94
Affected product: H2o
Published: 2024-06-27
Last modified: 2026-06-17

Description

In h2oai/h2o-3 version 3.46.0, the `run_tool` command in the `rapids` component allows the `main` function of any class under the `water.tools` namespace to be called. One such class, `MojoConvertTool`, crashes the server when invoked with an invalid argument, causing a denial of service.

Frequently asked questions

What is CVE-2024-5979?: In h2oai/h2o-3 version 3.46.0, the `run_tool` command in the `rapids` component allows the `main` function of any class under the `water.tools` namespace to be called. One such class, `MojoConvertTool`, crashes the server when invoked with an invalid argument, causing a denial of service.
How severe is CVE-2024-5979?: CVE-2024-5979 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-5979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-5979?: CVE-2024-5979 affects H2o. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-5979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-5979 have an EU (EUVD) identifier?: Yes. CVE-2024-5979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1927.
When was CVE-2024-5979 published?: CVE-2024-5979 was published on 2024-06-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:h2o:h2o:3.46.0:*:*:*:*:*:*:*

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