CVE-2026-33081 (GCVE-0-2026-33081)
Vulnerability from cvelistv5 – Published: 2026-03-20 09:05 – Updated: 2026-03-20 21:20
VLAI
EPSS
VEX
Title
PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation
Summary
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.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-20 21:20 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/pinchtab/pinchtab/security/adv… | x_refsource_CONFIRM |
| https://github.com/pinchtab/pinchtab/releases/tag… | x_refsource_MISC |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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