Security Digest · Vulnerability record
CVE-2023-6569: External Control of File Name or Path in h2oai/h2o-3
External Control of File Name or Path in h2oai/h2o-3
CVSS 9.3 Critical EPSS 0.7% · p53
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 0.7%, percentile 53: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 53% 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) < 3.46.0.1, fixed in 3.46.0.1. Check your lockfile, including transitive dependencies.
What it is
External Control of File Name or Path in h2oai/h2o-3
From the GitHub advisory
Remote unauthenticated attackers can overwrite arbitrary server files with attacker-controllable data. The data that the attacker can control is not entirely arbitrary. h2o writes a CSV/XLS/etc file to disk, so the attacker data is wrapped in quotations and starts with "C1", if they're exporting as CSV.
Weakness type: CWE-73, CWE-610.
Product: h2o (PyPI) · Assigned by: @huntr_ai · Published: 2023-12-14
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | h2o | < 3.46.0.1 | 3.46.0.1 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| h2oai | h2oai/h2o-3 | unspecified <= latest |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntr_ai | 3.0 | 9.3 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H |
| GitHub | 3.1 | 9.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: changed (can affect other components)
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 partial.
- FIRST EPSS (model of 2026-10-21): 0.72% probability of exploitation activity in the next 30 days; percentile 53.
Timeline
- — CVE record published by @huntr_ai
- — GitHub-reviewed advisory GHSA-gqrq-j6pm-98c2 published (critical)
- — CVE record last updated
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-gqrq-j6pm-98c2 github.com
- CVE.org record CVE-2023-6569 cve.org
- NVD entry CVE-2023-6569 nvd.nist.gov
Other references from the CVE record and advisory
- huntr.com huntr.com
- github.com github.com