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Findings

CVE-2026-33620

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser.

Published Mar 26, 2026 · updated Jun 17, 2026 · pinchtab pinchtab

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipboard history, and tracing systems that capture full URLs. This issue is an unsafe credential transport pattern rather than a direct authentication bypass. It only affects deployments where a token is configured and a client actually uses the query-parameter form. PinchTab's security guidance already recommended , but still accepted and included first-party flows that generated and consumed URLs containing the token. This was addressed in v0.8.4 by removing query-string token authentication and requiring safer header- or session-based authentication flows.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipb

  2. Jun 17, 2026 · NIST NVD

    Updated

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipb

Affected

  • cpe pinchtab/pinchtabversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-33620

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-33620

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL,

    nvd.nist.gov

References