CVE-2024-5986Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-3
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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.
- CVSS
- 9.1 CRITICAL (v3.0, CNA)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weakness (CWE)
- CWE-73
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- @huntr_ai
- NVD analysis
- Deferred
- Record last updated
- Feb 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
h2oai h2oai/h2o-3 h2oai:h2o_3 (from the name) | from unspecified through latest | CNA record |
References
- https://huntr.com/bounties/64ff5319-6ac3-4447-87f7-b53495d4d5a3
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.