CVE-2024-6960Public exploitNetwork attack vector

Code execution via unrestricted Iced model deserialization

Published Jul 21, 2024 · Updated Nov 25, 2024

Deserialization of untrusted data in H2O.ai H2O-3 3.46.0.4 and earlier allows remote attackers to execute code via a crafted model. The Iced model loader accepts embedded serialized Java objects and deserializes arbitrary classes without an allowlist, enabling gadget execution. Execution requires a user to import the malicious model through Flow's Import Model command or an equivalent API.

CVSS severity7.7
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in H2O.ai H2O-3 3.46.0.4 and earlier allows remote attackers to execute code via a crafted model. The Iced model loader accepts embedded serialized Java objects and deserializes arbitrary classes without an allowlist, enabling gadget execution. Execution requires a user to import the malicious model through Flow's Import Model command or an equivalent API.

The record

CVE
CVE-2024-6960
Published
Jul 21, 2024
Updated
Nov 25, 2024
Vendor
H2O.ai
Product
H2O-3
Classifications
CWE-502, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0
  2. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

H2O.ai · H2O-3version=0; version=0 <*

Published CVSS scores

7.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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