{"id":"CVE-2026-33081","state":"PUBLISHED","title":"PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation","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.","publishedAt":"2026-03-20T09:05:01.753Z","updatedAt":"2026-03-20T21:20:23.968Z","severity":{"score":5.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["pinchtab pinchtab"],"affected":[{"vendor":"pinchtab","product":"pinchtab","versions":[{"version":"< 0.8.3","status":"affected"}]}],"references":["https://github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m","https://github.com/pinchtab/pinchtab/releases/tag/v0.8.3"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33081.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33081","state":"PUBLISHED","datePublished":"2026-03-20T09:05:01.753Z","dateUpdated":"2026-03-20T21:20:23.968Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-17T19:27:06.345Z"},"containers":{"cna":{"title":"PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation","descriptions":[{"lang":"en","value":"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":[{"vendor":"pinchtab","product":"pinchtab","versions":[{"version":"< 0.8.3","status":"affected"}]}],"references":[{"url":"https://github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m","name":"https://github.com/pinchtab/pinchtab/security/advisories/GHSA-qwxp-6qf9-wr4m","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pinchtab/pinchtab/releases/tag/v0.8.3","name":"https://github.com/pinchtab/pinchtab/releases/tag/v0.8.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-20T09:05:01.753Z"},"source":{"advisory":"GHSA-qwxp-6qf9-wr4m","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-20T21:20:01.575679Z","id":"CVE-2026-33081","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-20T21:20:23.968Z"}}]}}}