What is GHSA-hc7p-6r8x-vr4q?

GHSA-hc7p-6r8x-vr4q is a security advisory published by GitHub Security Advisories with High severity. Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk \u003c2.5...

Which CVE IDs does GHSA-hc7p-6r8x-vr4q cover?

GHSA-hc7p-6r8x-vr4q covers the following CVE IDs: CVE-2026-8833. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-hc7p-6r8x-vr4q?

GHSA-hc7p-6r8x-vr4q has a CVSS v3 base score of 5.4, published by GitHub Security Advisories.

GHSA-hc7p-6r8x-vr4qHighCVSS 5.4

Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5...

Vendor

GitHub Security Advisories

Published

June 8, 2026

Last Modified

June 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-8833 →

📋 Description

Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicious URLs such as javascript: URIs, resulting in cross-site scripting when another user interacts with the crafted link.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-8833
https://checkmk.com/werk/20002
https://github.com/advisories/GHSA-hc7p-6r8x-vr4q