What’s Vulnerable › Vulnerabilities

CVE-2026-33081: PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-20 · updated 2026-06-17
• Weakness: CWE-918

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.

Affected products

• pinchtab: before 0.8.3 — fixed in 0.8.3

How to fix

Upgrade to a fixed version: pinchtab 0.8.3. Check the vendor advisory for mitigations.

References

• https://github.com/pinchtab/pinchtab/releases/tag/v0.8.3
• https://github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m

Get alerted when CVE-2026-33081 or the next vulnerability affects your stack