Vulnerability · Published Mar 20, 2025 · Assigned by @huntr_ai
CVE-2024-6863Encryption of Arbitrary Files with Attacker-Controlled Key in h2oai/h2o-3
Medium 6.5
In plain English
A medium-severity security flaw in h2oai/h2o-3 from h2oai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Official description
In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacker to encrypt arbitrary files with keys of their choice, making it exceedingly difficult for the target to recover the keys needed for decryption.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | ai.h2o:h2o-core | no fix listed | GHSA-m37h-8r48-2cxj |
| PyPI | h2o | no fix listed | GHSA-m37h-8r48-2cxj |
| PyPI | h2o | no fix listed | PYSEC-2026-1442 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| h2oai | h2oai/h2o-3 | unspecified – through latest |
Weakness: CWE-749 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L