CVE-2025-6544 (GCVE-0-2025-6544)
Vulnerability from cvelistv5
Published
2025-09-21 09:00
Modified
2025-09-22 17:23
Severity ?
9.8 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Summary
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.
References
security@huntr.devhttps://github.com/h2oai/h2o-3/commit/0298ee348f5c73673b7b542158081e79605f5f25
security@huntr.devhttps://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40
134c704f-9b21-4f2e-91b3-4a467353bcc0https://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40
Impacted products
Vendor Product Version
h2oai h2oai/h2o-3 Version: unspecified   < 3.46.8
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