H2O-3GHSA-m37h-8r48-2cxj
H2O Vulnerable to Execution of Arbitrary Files
Medium6.5CVE-2024-6863 · Published Mar 20, 2025 · updated Jul 7, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| h2o PyPI | >= 3.32.1.2, <= 3.46.0 | No fix yet |
Details and references
In h2oai/h2o-3 version 3.46.0, an endpoint exposing a custom EncryptionTool allows an attacker to encrypt any files on the target server with a key of their choosing. The chosen key can also be overwritten, resulting in ransomware-like behavior. This vulnerability makes it possible for an attacker to encrypt arbitrary files with keys of their choice, making it exceedingly difficult for the target to recover the keys needed for decryption.
- CVSS 3.0
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-749
- Also known as
- CVE-2024-6863, PYSEC-2026-1442
More H2O-3 advisories
All H2O-3| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` Endpoint CVE-2024-10550High7.5no fix yet | High7.5 | No fix yet |
| Mar 202025 | H2O Deserialization of Untrusted Data Vulnerability CVE-2024-10553Critical9.8fixed in 3.46.0.6 | Critical9.8 | 3.46.0.6 |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) and File Write CVE-2024-10572High7.5no fix yet | High7.5 | No fix yet |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint CVE-2024-10549High7.5no fix yet | High7.5 | No fix yet |
| Mar 202025 | H2O Vulnerable to Arbitrary File Overwrite via File Export CVE-2024-6854High7.1no fix yet | High7.1 | No fix yet |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) via Large GZIP Parsing CVE-2024-7765High7.5no fix yet | High7.5 | No fix yet |