CVE-2026-34206
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 products
- Captcha-Protect, Traefik
- Libops Captcha Protect
- < 1.12.2
- Fix
- Available
- CVSS 3.1
- 6.1 MEDIUM
- EPSS
- 0.2% (9th percentile)
- Weakness
- CWE-79
- NVD status
- Analyzed
- Published
- 2026-03-31
No indexed exploits for CVE-2026-34206 yet
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No exploit for CVE-2026-34206 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.