CVE-2026-82811
Received Received - Intake

Origin Validation Error in Toggl Track Extension

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: VulDB

Description
A security vulnerability has been detected in Toggl OÜ Toggl Track Extension 4.11.16. This affects an unknown function of the component postMessage Handler. The manipulation leads to origin validation error. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-82811
EUVD
EUVD-2026-68679

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
toggl_ü toggl_track 4.11.16
toggl_oü toggl_track_extension 4.11.16

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.
CWE-345 The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

Attack-Flow Graph

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Executive Summary

CVE-2026-82811 is a vulnerability in Toggl Track Chrome extension version 4.11.16. It involves a postMessage handler that processes session-state messages without proper origin validation. The handler checks if the message source is the window and if the direction field matches specific values, but these checks are insufficient. Attackers can forge messages like logout or login-success, manipulating the extension's session state remotely.

Detection Guidance

Check if the Toggl Track Chrome extension version 4.11.16 is installed. Inspect network traffic for unauthorized postMessage events or session-state manipulations. Use browser developer tools to monitor extension messaging behavior.

Impact Analysis

This vulnerability allows attackers to remotely force logout, disrupt time tracking, or potentially take over accounts by manipulating session state. Users may experience unauthorized actions like clearing session data or sending user IDs for verification without consent.

Mitigation Strategies

Update the Toggl Track extension to the latest version. Disable the extension if no update is available. Implement strict origin validation for postMessage handlers in extensions. Avoid using page-context postMessage for sensitive operations.

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