What is CVE-2026-40302?

CVE-2026-40302 is a medium-severity vulnerability in Openziti Zrok, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-17.

How severe is CVE-2026-40302?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Openziti Zrok

CVE-2026-40302

zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the proxyUi template engine uses Go's text/template (which performs no HTML escaping) instead of html/template. The GitHub OAuth callback hand…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Openziti Zrok — versions < 2.0.1

Weakness classification (CWE)

References

https://github.com/openziti/zrok/security/advisories/GHSA-4fxq-2x3x-6xqx (x_refsource_CONFIRM)
https://github.com/openziti/zrok/releases/tag/v2.0.1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40302?: CVE-2026-40302 is a medium-severity vulnerability in Openziti Zrok, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-17.
How severe is CVE-2026-40302?: Medium severity. CVSS v3 base score is 6.1 out of 10.