Vulnerability · Published May 17, 2026 · Assigned by VulDB

CVE-2026-8750h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure

Medium 5.3

In plain English

A medium-severity information exposure in h2o-3 from h2oai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.5%top 57.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
h2oai	h2o-3	7402

Weakness: CWE-200, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-364377 | h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure vdb-entry, technical-description
VDB-364377 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #810105 | H2O-3 latest arbitrary local file disclosure third-party-advisory
https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3 exploit