CVE-2026-8752

44th percentile - higher than 44% of all known CVEs

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.

A remote attacker can use the publicly available exploit to bypass access controls and gain unauthorized access to the system.

Restrict network access to h2o-3 instances, monitor for exploitation attempts, and consider compensating controls until the vendor provides a fix.