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

🗓️ 07 Jul 2026 14:34:51Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 4 Views

DoS in h2o-3 3.46.0.1 via /3/ParseSetup; user regex on input causes backtracking and exhaustion.

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07 Jul 2026 17:46Current
5.9Medium risk
Vulners AI Score5.9
CVSS 37.5
EPSS0.00588
4