Privilege escalation in H2o
CVE-2026-8752
A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access controls. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- H2o
- H2oai H2o-3 — versions 7402
Weakness classification (CWE)
References
- vuldb.com/submit/810108 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/vuln/364379 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/364379/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vulnplus-note.wetolink.com/share/pyVa0GWPuAZE (exploit, Broken Link)
Frequently asked questions
- What is CVE-2026-8752?
- CVE-2026-8752 is a medium-severity vulnerability in H2o, classified under Incorrect Privilege Assignment. CVSS score: 5.3/10. Published 2026-05-17.
- How severe is CVE-2026-8752?
- Medium severity. CVSS v3 base score is 5.3 out of 10.