Access Control Weakness in H2O.ai H2O-3 Software
CVE-2026-8752

6.9MEDIUM

Key Information:

Vendor

H2oai

Status
H2o-3
Vendor
CVE Published:
17 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8752?

A vulnerability has been identified in H2O.ai's H2O-3 software, specifically within the exec function of the AstSetProperty.java file in the Rapids setproperty Primitive Handler. This flaw allows for improper access controls, potentially enabling unauthorized manipulation and access from a remote attacker. The exploit has been released publicly and poses significant risks to affected systems. Despite early disclosure, the vendor has yet to respond to the security findings.

Affected Version(s)

h2o-3 7402

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-8752 - Proof of Concept

References

https://vuldb.com/vuln/364379
vdb-entrytechnical-description
https://vuldb.com/vuln/364379/cti
signaturepermissions-required
https://vuldb.com/submit/810108
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

vulnplusbot (VulDB User)
VulDB CNA Team
.