h2 vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary
CVE-2025-57804Mediumh2: h2 allows HTTP Request Smuggling due to illegal characters in headersGHSA-Q6CP-QFWQ-4GCVMediumh2: h2 servers vulnerable to degradation of service with CONTINUATION FloodGHSA-8R5V-VM4M-4G25Mediumh2: Resource exhaustion vulnerability in h2 may lead to Denial of Service (DoS)CVE-2023-26964Mediumh2: h2 vulnerable to denial of service

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