What’s Vulnerable › Vulnerabilities

CVE-2026-82811: Toggl OÜ Toggl Track Extension postMessage origin validation

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-31 · updated 2026-08-31
• Weakness: CWE-345

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.

Affected products

• Toggl OÜ Toggl Track Extension: 4.11.16

References

• https://github.com/xryj920/chrome_extensions/blob/main/Toggl%20O%C3%9C%20Toggl%20Track%204.11.16%20accepts%20forged%20session-state%20messages%20through%20an%20unauthenticated%20postMessage%20handler
• https://vuldb.com/cve/CVE-2026-82811
• https://vuldb.com/submit/875273
• https://vuldb.com/vuln/397230
• https://vuldb.com/vuln/397230/cti

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