PinchTab up to 0.8.3 URL Query Parameter token get request method with sensitive query strings

Summaryinfo

A vulnerability was found in PinchTab up to 0.8.3 and classified as problematic. This issue affects some unknown processing of the component URL Query Parameter Handler. The manipulation of the argument token results in use of get request method with sensitive query strings. This vulnerability is reported as CVE-2026-33620. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PinchTab up to 0.8.3. It has been classified as problematic. Affected is an unknown code of the component URL Query Parameter Handler. The manipulation of the argument token with an unknown input leads to a use of get request method with sensitive query strings vulnerability. CWE is classifying the issue as CWE-598. The web application uses the HTTP GET method to process a request and includes sensitive information in the query string of that request. This is going to have an impact on confidentiality. CVE summarizes:

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 `, 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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-33620 since 03/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 0.8.4 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Name

• PinchTab

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3

Website

• Product: https://github.com/pinchtab/pinchtab/

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