Improper Input Validation Affecting openshift4/ose-monitoring-plugin-rhel9 package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.33% (26th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL7-OPENSHIFT4OSEMONITORINGPLUGINRHEL9-15541211
  • published14 Mar 2026
  • disclosed26 Feb 2026

Introduced: 26 Feb 2026

CVE-2026-27959  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 openshift4/ose-monitoring-plugin-rhel9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift4/ose-monitoring-plugin-rhel9 package and not the openshift4/ose-monitoring-plugin-rhel9 package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Koa is middleware for Node.js using ES2017 async functions. Prior to versions 3.1.2 and 2.16.4, Koa's ctx.hostname API performs naive parsing of the HTTP Host header, extracting everything before the first colon without validating the input conforms to RFC 3986 hostname syntax. When a malformed Host header containing a @ symbol is received, ctx.hostname returns evil[.]com - an attacker-controlled value. Applications using ctx.hostname for URL generation, password reset links, email verification URLs, or routing decisions are vulnerable to Host header injection attacks. Versions 3.1.2 and 2.16.4 fix the issue.

CVSS Base Scores

version 3.1