CVE-2026-82811: Origin Validation Error in Toggl OÜ Toggl Track Extension

This vulnerability affects Toggl Track Extension version 4.11.16 and arises from improper origin validation in the postMessage handler component. An attacker can remotely exploit this flaw to manipulate the extension's behavior via crafted postMessage events. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity. The vendor was notified but has not provided any remediation or patch, and no official fix or mitigation guidance is available at this time.

Successful exploitation could allow an attacker to interact with the extension through unauthorized postMessage events, potentially leading to limited integrity or availability impacts. The CVSS vector indicates no privileges or user interaction are required, but the impact on confidentiality is none, and impacts on integrity and availability are low. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch or workaround is available, users should exercise caution when using version 4.11.16 of the Toggl Track Extension and monitor for updates from the vendor.