PYSEC-2026-350

vendorUSosv

External Control of File Name or Path in h2oai/h2o-3

view advisory published 2026-06-29Licence: CC-BY-4.0

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.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2023-6569UShigh8.2—
External Control of File Name or Path in h2oai/h2o-3
02

references

External citations — patches, advisories, analysis.

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