CVE-2026-8752 h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control
Remote attackers can exploit improper access controls in the Rapids setproperty primitive to escalate privileges or execute code in h2o-3.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8752?
CVE-2026-8752 is a medium-severity missing authorization vulnerability in h2oai h2o-3, published on 17 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-8752?
It affects 1 product.
Products include H2o H2o.
How do I fix CVE-2026-8752?
No fix has been published for CVE-2026-8752 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-8752 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8752 exists.
Other vulnerabilities in h2oai h2o-3
Sources
Also known as GHSA-cq43-78ch-3f5q.