Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%

h2o — Vulnerabilities & Security Advisories 18

Browse all 18 CVE security advisories affecting h2o. AI-powered Chinese analysis, POCs, and references for each vulnerability.

H2o serves as an open-source machine learning platform primarily used for training and deploying predictive models. Historically, it has been susceptible to remote code execution, cross-site scripting, and privilege escalation vulnerabilities, often stemming from improper input validation and insecure deserialization. The platform's Java-based architecture and web interface have contributed to these security issues. While no major public security incidents have been widely reported, the 10 documented CVEs highlight consistent security challenges, particularly in authentication and data handling components. Organizations implementing H2o should prioritize regular updates and input sanitization to mitigate these recurring risks.

Top products by h2o: h2o quicly picotls
CVE IDTitleCVSSSeverityPublished
CVE-2026-54340 h2o has HTTP/2 state amplification — h2oCWE-400 7.5 High2026-07-16
CVE-2026-44453 h2o is vulnerable to musl libc stack overflow — h2oCWE-789 7.5 High2026-07-16
CVE-2026-44452 h2o is vulnerable to heap overrun — h2oCWE-125 5.9 Medium2026-07-16
CVE-2026-44436 Quicly is vulnerable to connection state corruption — quiclyCWE-120 7.5 High2026-07-16
CVE-2026-44435 Quicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KB — quiclyCWE-617 7.5 High2026-07-16
CVE-2026-44434 Quicly is vulnerable to stateless reset injection — quiclyCWE-345 5.3 Medium2026-07-16
CVE-2026-44433 Quicly is vulnerable to memory exhaustion — quiclyCWE-770 5.3 Medium2026-07-16
CVE-2026-55213 h2o: musl libc stack overflow (QPACK) — h2oCWE-789 7.5 High2026-07-10
CVE-2025-61684 Quicly has assertion failures — quiclyCWE-20 7.5 High2026-01-19
CVE-2024-45402 Picotls double free — picotlsCWE-415 8.6 High2024-10-11
CVE-2024-45396 Quicly assertion failures — quiclyCWE-617 7.5 High2024-10-11
CVE-2024-45403 H2O assertion failure when HTTP/3 requests are cancelled — h2oCWE-617 3.7 Low2024-10-11
CVE-2024-45397 H2O alllows bypassing address-based access control with 0-RTT — h2oCWE-284 5.9 Medium2024-10-11
CVE-2024-25622 H2O ignores headers configuration directives — h2oCWE-670 3.1 Low2024-10-11
CVE-2023-50247 h2o QUIC state exhaustion DoS — h2oCWE-770 3.7 Low2023-12-12
CVE-2023-41337 h2o vulnerable to TLS session resumption misdirection — h2oCWE-347 6.1 Medium2023-12-12
CVE-2023-30847 H2O vulnerable to read from uninitialized pointer in the reverse proxy handler — h2oCWE-824 8.2 High2023-04-27
CVE-2021-43848 Unititialized memory access in h2o — h2oCWE-908 7.4 High2022-02-01

This page lists every published CVE security advisory associated with h2o. Each entry links to a detailed page with CVSS scoring, CWE classification, affected products and references. AI-generated Chinese analysis is provided for fast triage.