PYSEC-2026-1443 H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint

A vulnerability in the /3/ImportFiles endpoint of h2oai/h2o-3 version 3.46.1 allows an attacker to cause a denial of service. The endpoint takes a single GET parameter, path, which can be recursively set to reference itself. This leads the server to repeatedly call its own endpoint, eventually...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS via the /3/ImportFiles endpoint. An attacker can cause the server to repeatedly call its own endpoint, eventually filling up the request queue and leaving the server unable to handle other requests by recursively...

CVE-2023-6038

A Local File Inclusion LFI vulnerability exists in the h2o-3 REST API, allowing unauthenticated remote attackers to read arbitrary files on the server with the permissions of the user running the h2o-3 instance. This issue affects the default installation and does not require user interaction. Th...