H2O
56 CVEs tracked. 1 of them are in CISA KEV.
This hub aggregates every CVE we track for H2O, a product in the oss libraries space. Use it to gauge the current risk picture and drill into individual advisories.
H2O CVEs per month
| Month | CVEs |
|---|---|
| 2024-10 | 3 |
| 2024-11 | 0 |
| 2024-12 | 0 |
| 2025-01 | 0 |
| 2025-02 | 0 |
| 2025-03 | 10 |
| 2025-04 | 0 |
| 2025-05 | 0 |
| 2025-06 | 0 |
| 2025-07 | 0 |
| 2025-08 | 1 |
| 2025-09 | 5 |
| 2025-10 | 0 |
| 2025-11 | 0 |
| 2025-12 | 0 |
| 2026-01 | 0 |
| 2026-02 | 1 |
| 2026-03 | 0 |
| 2026-04 | 1 |
| 2026-05 | 3 |
| 2026-06 | 0 |
| 2026-07 | 4 |
| 2026-08 | 0 |
| 2026-09 | 0 |
Severity
How the 56 CVEs score on CVSS. Severity is not exploitation: KEV is counted above.
- Critical10
- High31
- Medium11
- Low4
Latest CVEs
The 15 most recently published vulnerabilities affecting H2O.
- CVE-2026-54340h2o has HTTP/2 state amplification7.5
- CVE-2026-44453h2o is vulnerable to musl libc stack overflow7.5
- CVE-2026-44452h2o is vulnerable to heap overrun5.9
- CVE-2026-55213h2o: musl libc stack overflow (QPACK)7.5
- CVE-2026-8752h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control5.3
- CVE-2026-8751h2oai h2o-3 JAR Model.java importBinaryModel deserialization7.3
- CVE-2026-8750h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure5.3
- CVE-2026-3960Remote Code Execution in h2oai/h2o-39.8
- CVE-2024-5986Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-39.1
- CVE-2025-10769h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization6.3
- CVE-2025-10768h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization6.3
- CVE-2025-6544Deserialization Vulnerability in h2oai/h2o-39.8
- CVE-2025-5662Deserialization Vulnerability in h2oai/h2o-39.8
- CVE-2025-6507Deserialization of Untrusted Data in h2oai/h2o-39.8
- CVE-2025-8671CVE-2025-86717.5
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