{"id":"CVE-2026-33081","aliases":["GHSA-qwxp-6qf9-wr4m","GO-2026-4748"],"url":"https://o3.security/vulnerability/CVE-2026-33081","summary":"PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation","details":"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.","published":"2026-03-20T09:05:01.753Z","modified":"2026-08-05T03:32:13.276647377Z","cvss":{"score":5.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/pinchtab/pinchtab","fixedVersion":"0.8.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/pinchtab/pinchtab/releases/tag/v0.8.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33081.json"},{"type":"ADVISORY","url":"https://github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33081"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-05T03:32:13.276647377Z"}}