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CVE-2025-6544

🚨 CRITICAL

A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handlin...

Published
Sep 21, 2025
Last Modified
Sep 22, 2025
Views
2
Bookmarks
0

Description

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A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.

CVSS Scores

CVSS 3.1 9.8
9.8
CRITICAL
CVSS 2.0 9.8

References

github.com huntr.com huntr.com

Additional Information

Source
security@huntr.dev
State
Awaiting analysis

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