CVE-2016-7835: Use-after-free vulnerability in H2O allows remote attackers to cause a denial-of-service (DoS) or obtain se...

Security readout for executives and security teams

H2O web server 2.0.4 and earlier has a memory-safety flaw that a remote attacker could use to crash the service or expose sensitive server information, including TLS certificate private keys. Treat affected public-facing H2O deployments as urgent because private key exposure can undermine encrypted traffic trust. Exposure is limited to systems running H2O version 2.0.4 or earlier, especially internet-facing services terminating TLS with server certificates. Organizations not using H2O, or using versions outside the stated affected range, are not indicated as affected by the provided sources. Prioritize remediation for any public H2O server at or below 2.0.4, particularly where it protects customer or internal encrypted traffic. The business concern is not only outage risk, but possible compromise of certificate private keys. Mitigation focus: Inventory H2O deployments and identify versions 2.0.4 or earlier.; Check H2O and JVN guidance for the fixed or recommended release.; Prioritize upgrading or replacing affected internet-facing H2O instances..

Prepared

Jun 13, 2026, 04:43 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.