CVE-2025-6507: A vulnerability in the h2oai/h2o-3 repository allows attackers to exploit deserialization of untrusted data, potentially leading to arbitrary code execution…

PriorityP273critical9.8CVSS 3.0

AVNACLPRNUINSUCHIHAH

EPSS

12.99%

95.8th percentile

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

5 ranges

Vendor	Product	Version range	Fixed in
h2oai	h2oai_h2o-3	>= unspecified < 3.46.0.8	3.46.0.8
msrc	azl3_python3_3.12.0-4_on_azure_linux_3.0	—	—
msrc	azl3_python3_3.12.3-1_on_azure_linux_3.0	—	—
msrc	azure_linux_3.0_arm	—	—
msrc	azure_linux_3.0_x64	—	—

CVSS provenance

nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

vendor_msrc6.1MEDIUM

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