Vulnerability · Published Sep 1, 2025 · Assigned by @huntr_ai
CVE-2025-6507Deserialization of Untrusted Data in h2oai/h2o-3
Critical 9.8
In plain English
A critical-severity unsafe deserialization 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 17.3% (higher than 97% of all known vulnerabilities).
Official description
A vulnerability in the h2oai/h2o-3 repository allows attackers to exploit deserialization of untrusted data, potentially leading to arbitrary code execution and reading of system files. This issue affects the latest master branch version 3.47.0.99999. The vulnerability arises from the ability to bypass regular expression filters intended to prevent malicious parameter injection in JDBC connections. Attackers can manipulate spaces between parameters to evade detection, allowing for unauthorized file access and code execution. The vulnerability is addressed in version 3.46.0.8.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| h2oai | h2oai/h2o-3 | unspecified – before 3.46.0.8 |
Weakness: CWE-502 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H