VULNERABILITY INTELLIGENCE

CVE-2016-4864

CVSS score7.5 HIGH
EPSS probability1.80%
CISA KEVNot currently listed
Published2017-05-12
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.

Weakness classification

  • CWE-134: Use of Externally-Controlled Format String

Primary references