Security Digest · Vulnerability record
CVE-2024-10553: H2O Deserialization of Untrusted Data Vulnerability
A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data.
CVSS 9.8 Critical EPSS 1.6% · p75
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.6%, percentile 75: FIRST’s model estimates a 1.6% chance of exploitation activity in the next 30 days, higher than 75% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
h2o(PyPI) < 3.46.0.6, fixed in 3.46.0.6;ai.h2o:h2o-core(Maven) < 3.46.0.6, fixed in 3.46.0.6. Check your lockfile, including transitive dependencies.
What it is
A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.47.0.
From the GitHub advisory
A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.46.0.6.
Weakness type: CWE-502.
Product: h2o (PyPI) · Assigned by: @huntr_ai · Published: 2025-03-20
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | h2o | < 3.46.0.6 | 3.46.0.6 |
| Maven | ai.h2o:h2o-core | < 3.46.0.6 | 3.46.0.6 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| h2oai | h2oai/h2o-3 | unspecified < 3.47.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntr_ai | 3.0 | 9.8 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 1.59% probability of exploitation activity in the next 30 days; percentile 75.
Timeline
- — CVE record last updated
- — CVE record published by @huntr_ai
- — GitHub-reviewed advisory GHSA-h7xg-cmpp-48hf published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-h7xg-cmpp-48hf github.com
- CVE.org record CVE-2024-10553 cve.org
- NVD entry CVE-2024-10553 nvd.nist.gov
Other references from the CVE record and advisory
- huntr.com huntr.com
- github.com github.com