Vulnerability in Toggl Oü Track Extension
CVE-2026-82811
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Toggl Oü Track Extension — versions 4.11.16
Weakness classification (CWE)
References
- vuldb.com/vuln/397230 (vdb-entry)
- vuldb.com/vuln/397230/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82811 (third-party-advisory)
- vuldb.com/submit/875273 (third-party-advisory)
- github.com/xryj920/chrome_extensions/blob/main/Toggl OÜ Toggl Track 4.11.16 acc… (exploit)
Frequently asked questions
- What is CVE-2026-82811?
- CVE-2026-82811 is a medium-severity vulnerability in Toggl Oü Track Extension, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.4/10. Published 2026-08-31.
- How severe is CVE-2026-82811?
- Medium severity. CVSS v3 base score is 5.4 out of 10.