PYSEC-2026-1440 H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` Endpoint

A vulnerability in the /3/ParseSetup endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service DoS attack. The endpoint applies a user-specified regular expression to a user-controllable string. This can be exploited by an attacker to cause inefficient regular expression complexity,...

Regular Expression Denial of Service (ReDoS)

Overview Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS through the /3/ParseSetup endpoint. An attacker can cause inefficient regular expression complexity, leading to the exhaustion of server resources and making the server unresponsive by applying...

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...

PT-2023-32489 · H2O-3 · H2O-3

Name of the Vulnerable Software and Affected Versions: h2o-3 version 3.40.0.4 Description: A Local File Inclusion LFI issue 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. Th...