CVE-2026-8750 Details
Description
A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
A vulnerability allowing information disclosure exists in H2O.ai H2O-3 versions prior to 7402. The issue arises in the ImportFile API, specifically within the importFiles function of PersistNFS.java. This vulnerability allows remote, unauthenticated attackers to read arbitrary local files that are accessible to the H2O-3 process. The exploitation involves importing a file through an unauthenticated endpoint, bypassing incomplete path restrictions, and then retrieving the file's contents via the Frames API.
It is recommended to require authentication and authorization for the 'ImportFiles' endpoint, disable local filesystem imports by default, restrict imports to an allowlisted data directory, validate and canonicalize supplied paths, replace blacklist-based controls with an allowlist model, and add audit logging for file import operations.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://vuldb.com/submit/810105 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/364377 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/364377/cti | [email protected] | Permissions RequiredVDB Entry |
| https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3 | [email protected] | Broken Link |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| h2o h2o | <= 7402 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 19, 2026 | Initial Analysis | [email protected] |
| May 17, 2026 | New CVE Received | [email protected] |