Description
A vulnerability in the `/3/Parse` endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service (DoS) attack. The endpoint uses a user-specified string to construct a regular expression, which is then applied to another user-specified string. By sending multiple simultaneous requests, an attacker can exhaust all available threads, leading to a complete denial of service.
Scores
CVSS v3
7.5
EPSS
0.0045
EPSS Percentile
63.8%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1333
Status
published
Products (3)
ai.h2o/h2o-core
3.30.0.7Maven
h2o/h2o
3.46.0.1
pypi/h2o
3.30.0.7PyPI
Published
Mar 20, 2025
Tracked Since
Feb 18, 2026