Cloudanix VulnDB

CVE-2026-34206

Medium · 6.1

CVSS

6.1

EPSS

0.3%

Published

Mar 31, 2026

CISA due date

—

The record

Captcha Protect is a Traefik middleware to add an anti-bot challenge to individual IPs in a subnet when traffic spikes are detected from that subnet. Prior to version 1.12.2, a reflected cross-site scripting (XSS) vulnerability exists in github.com/libops/captcha-protect. The challenge page accepted a client-supplied destination value and rendered it into HTML using Go's text/template. Because text/template does not perform contextual HTML escaping, an attacker could supply a crafted destination value that breaks out of the hidden input attribute and injects arbitrary script into the challenge page. This issue has been patched in version 1.12.2.

Affected packages

Ecosystem Package Introduced Fixed

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