CVE-2026-82811CWE-345CWE-346

CVE-2026-82811

Medium · published August 31, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
11.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
CVSS v4.0
5.3 · 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
EPSS
0.00218 · 11.6th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-346 · Origin Validation Error
Published
2026-08-31T22:17Z
References (5)
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 · [email protected]https://vuldb.com/cve/CVE-2026-82811 · [email protected]https://vuldb.com/submit/875273 · [email protected]https://vuldb.com/vuln/397230 · [email protected]https://vuldb.com/vuln/397230/cti · [email protected]
EPSS history
Timeline
  • 02 SEP 03:40Z
    EPSS moved — → 0%
    epss
  • 31 AUG 17:00Z
    Toggl OÜ Toggl Track Extension postMessage origin validation
    cvelistv5