H2O deserializes ML models without filtering, potentially allowing execution of malicious code
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
The H2O machine learning platform uses "Iced" classes as the primary means of moving Java Objects around the cluster. The Iced format supports inclusion of serialized Java objects. When a model is deserialized, any class is allowed to be deserialized (no class whitelist). An attacker can construct a crafted Iced model that uses Java gadgets and leads to arbitrary code execution when imported to the H2O platform.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | ai.h2o:h2o-core | all versions | — | No fix listed | CNA |
| — | ai.h2o:h2o-core (Maven) | up to 3.46.0.4 | — | No fix listed | GHSA-w36w-948j-xhfw |
- ai.h2o:h2o-core Vendor— Affected all versions Fixed in — No fix listed CNA
- ai.h2o:h2o-core (Maven) Vendor— Affected up to 3.46.0.4 Fixed in — No fix listed GHSA-w36w-948j-xhfw
CPE names CISA-ADP · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mvnrepository:h2o-core:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:mvnrepository:h2o-core:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-6960
- 2026-10-03 Alias added: GHSA-w36w-948j-xhfw
References
Advisory 2
Sources
- CVE-2024-6960 · CVE Program
- CVE-2024-6960 · NVD
- FIRST EPSS
- GHSA-w36w-948j-xhfw · GitHub Advisory Database · CC BY 4.0
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