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CVE-2026-8751

📛 CVE Title

h2oai h2o-3 JAR Model.java importBinaryModel deserialization

⬇ Download JSON ⚠ View as Threat

Description

A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Overview

State
PUBLISHED
Assigner (CNA)
VulDB
CVSS severity
MEDIUM
CVSS score
CVSS 6.9 / 10 6.9 6.9 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Effective score
6.9 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-502, CWE-20
Reserved
2026-05-16
Published
2026-05-17 13:30 UTC
Last updated
2026-05-17 13:30 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8751.json
Linked Threat
CVE-2026-8751 — CVE-2026-8751

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-17 12:16:42 UTC
NVD last modified
2026-05-19 17:46:04 UTC
NVD CVSS v3.1
CVSS 7.3 / 10 7.3 7.3 / 10 HIGH source: cna@vuldb.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Exploitability subscore
3.9 / 10
Impact subscore
3.4 / 10
EPSS score
0.0004 (probability of exploitation in next 30 days)
EPSS percentile
11.59% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 06:04 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-30697
Assigner
VulDB
Published
May 17, 2026, 11:30:10 AM
Updated
May 18, 2026, 2:19:22 PM
EUVD base score (CVSS 4.0)
6.9 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EUVD-reported EPSS
0.0400
Vendors
h2oai
Products
h2o-3 (7402)
Aliases
GHSA-gvx7-3472-56wj

ENISA description: A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

EUVD references (4)

Affected products (1)
VendorProductVersionsPlatforms
h2oai h2o-3 7402 (affected) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:h2o:h2o:*:*:*:*:*:*:*:*

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

MITRE references (4) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-8751.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "JAR Handler"
          ],
          "product": "h2o-3",
          "vendor": "h2oai",
          "versions": [
            {
              "status": "affected",
              "version": "7402"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "vulnplusbot (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "Deserialization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-17T11:30:10.692Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-364378 | h2oai h2o-3 JAR Model.java importBinaryModel deserialization",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/364378"
        },
        {
          "name": "VDB-364378 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/364378/cti"
        },
        {
          "name": "Submit #810107 | H2O-3 latest Pre-Auth Insecure Deserialization",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/810107"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-16T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-16T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-16T18:25:55.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "h2oai h2o-3 JAR Model.java importBinaryModel deserialization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-8751",
    "datePublished": "2026-05-17T11:30:10.692Z",
    "dateReserved": "2026-05-16T16:20:44.883Z",
    "dateUpdated": "2026-05-17T11:30:10.692Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}