CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request...

CVE-2026-41042

Unauthenticated callers can supply a malicious H2 JDBC URL through the testConnection API, which executes arbitrary Java code on the server via H2's INIT parameter. Vulnerability in Apache Gravitino. This issue affects Apache Gravitino: before 1.2.1. Users are recommended to upgrade to version...

RUSTSEC-2024-0003 Resource exhaustion vulnerability in h2 may lead to Denial of Service (DoS)

An attacker with an HTTP/2 connection to an affected endpoint can send a steady stream of invalid frames to force the generation of reset frames on the victim endpoint. By closing their recv window, the attacker could then force these resets to be queued in an unbounded fashion, resulting in Out ...

CVE-2022-39361 Metabase vulnerable to Remote Code Execution via H2

Metabase is data visualization software. Prior to versions 0.44.5, 1.44.5, 0.43.7, 1.43.7, 0.42.6, 1.42.6, 0.41.9, and 1.41.9, H2 Sample Database could allow Remote Code Execution RCE, which can be abused by users able to write SQL queries on H2 databases. This issue is patched in versions 0.44.5...

Remote Code Execution

h2 is vulnerable to remote code execution. The vulnerability exists due to a lack of secure input validation in DatabaseMetaLocal.java , allowing remote authenticated attackers to execute arbitrary code in the server...

SpringBootVulExploit

It is an offensive tool for Spring Boot exploitation. The repository contains a collection of exploits and techniques for exploiting Spring Boot applications, including: Spring Boot Vulnerability Exploit Check List: a checklist for identifying vulnerabilities in Spring Boot applications...