SSRF in Pinchtab
CVE-2026-33081
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Pinchtab — versions < 0.8.3
Weakness classification (CWE)
References
- github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m (Exploit, Mitigation, Vendor Advisory)
- github.com/pinchtab/pinchtab/releases/tag/v0.8.3 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-33081?
- CVE-2026-33081 is a medium-severity vulnerability in Pinchtab, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-03-20.
- How severe is CVE-2026-33081?
- Medium severity. CVSS v3 base score is 5.8 out of 10.