CVE-2026-33081
Description
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. Versions 0.8.2 and below have a Blind SSRF vulnerability in the /download endpoint. The validateDownloadURL() function only checks the initial user-supplied URL, but the embedded Chromium browser can follow attacker-controlled redirects/navigations to internal network addresses after validation. Exploitation requires security.allowDownload=true (disabled by default), limiting real-world impact. An attacker-controlled page can use JavaScript redirects or resource requests to make the browser reach internal services from the PinchTab host, resulting in a blind Server-Side Request Forgery (SSRF) condition against internal-only services. The issue has been patched in version 0.8.3.
How to fix
- pinchtab pinchtab0.8.3 or later
- github.com/pinchtab/pinchtab0.8.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pinchtab pinchtab | v < 0.8.3 | 0.8.3 |
| github.com/pinchtab/pinchtabGo | v < 0.8.3 | 0.8.3 |
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