CVE-2025-10768Network attack vectorHinoki check available

Authenticated data access via JDBC deserialization

Published Sep 21, 2025 · Updated Sep 21, 2025

Deserialization in H2O.ai H2O-3 3.46.08 allows remote authenticated users to read or alter data through a crafted JDBC URL. The /99/ImportSQLTable endpoint passes attacker-controlled connection_url input to the IBM DB2 JDBC driver, which deserializes it without adequate validation. Low-privileged API access is required; public sources disclose neither the serialized payload format nor a more specific consequence than limited data access, alteration, and service interruption.

CVSS severity9.8
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deserialization in H2O.ai H2O-3 3.46.08 allows remote authenticated users to read or alter data through a crafted JDBC URL. The /99/ImportSQLTable endpoint passes attacker-controlled connection_url input to the IBM DB2 JDBC driver, which deserializes it without adequate validation. Low-privileged API access is required; public sources disclose neither the serialized payload format nor a more specific consequence than limited data access, alteration, and service interruption.

The record

CVE
CVE-2025-10768
Published
Sep 21, 2025
Updated
Sep 21, 2025
Vendor
H2O.ai
Product
H2O-3
Classifications
CWE-20, CWE-502, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.46.08

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

H2O.ai · H2O-3version=3.46.08

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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