Answer in brief
CVE-2024-5986 records a Critical severity (CVSS 9.1) vulnerability in H2O has an External Control of File Name or Path vulnerability. The current sources do not mark it as known exploited. The current feed maps ai.h2o:h2o-core (maven), ai.h2o:h2o-core (maven), h2o (pip), h2o (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ai.h2o:h2o-core (maven), ai.h2o:h2o-core (maven), h2o (pip), h2o (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ai.h2o:h2o-coremaven | >=0 | Not reported |
| ai.h2o:h2o-coremaven | <=3.46.0.1 | Not reported |
| h2opip | <=3.46.0.1 | Not reported |
| h2opypi | >=0 | Not reported |
Published upstream
Feb 2, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Oct 27, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
A vulnerability in h2oai/h2o-3 version 3.46.0.1 allows remote attackers to write arbitrary data to any file on the server. This is achieved by exploiting the `/3/Parse` endpoint to inject attacker-controlled data as the header of an empty file, which is then exported using the `/3/Frames/framename/export` endpoint. The impact of this vulnerability includes the potential for remote code execution and complete access to the system running h2o-3, as attackers can overwrite critical files such as private SSH keys or script files.
Quoted source text, attributed separately from HOL analysis.