Dashboard / CVE-2026-40302

CVE-2026-40302

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 62/100
Published: 2026-04-17 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Changed
C: Low
I: Low
A: None

Description

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 handlers in both publicProxy and dynamicProxy embed the attacker-controlled refreshInterval query parameter verbatim into an error message when time.ParseDuration fails, and render that error unescaped into HTML. An attacker can deliver a crafted login URL to a victim; after the victim completes the GitHub OAuth flow, the callback page executes arbitrary JavaScript in the OAuth server's origin. Version 2.0.1 patches the issue.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
netfoundry zrok < 2.0.1

References & Advisories (2)

Bug Bounty Relevance

62 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

6.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.21%
Raw Score 0.002090
Percentile 11.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00209
2026-10-28
0.00209

Intelligence Sources

nvd ref →

External Links