PinchTab: API Bearer Token Exposed in URL Query Parameter via Server Logs and Intermediary Systems

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.7.8` through `v0.8.3` accepted the API token from a `token` URL query parameter in addition to the `Authorization` 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 `Authorization: Bearer <token>`, but `v0.8.3` still accepted `?token=` 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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

通过GET请求中的查询字符串导致的信息暴露

pinchtab 安全漏洞

pinchtab是Pinchtab开源的一个AI代理浏览器控制工具。 pinchtab 0.7.8至0.8.3版本存在安全漏洞，该漏洞源于通过URL查询参数传输API令牌，可能导致凭据泄露。

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