# CVE-2026-82811

## Summary

- **CVE ID:** CVE-2026-82811
- **Severity:** MEDIUM
- **CVSS Score:** 6.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P)
- **CWE:** CWE-346, CWE-345
- **Published:** Aug 31, 2026
- **Last Modified:** Aug 31, 2026

## 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

- [CNA](https://vuldb.com/vuln/397230)
- [CNA](https://vuldb.com/vuln/397230/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-82811)
- [CNA](https://vuldb.com/submit/875273)
- [CNA](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)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._