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

5.3MEDIUM

Key Information:

Vendor

Toggl Oü

Status
Toggl Track Extension
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82811?

A security vulnerability has been identified in the Toggl Track Extension version 4.11.16 that allows remote attackers to exploit an origin validation error through the postMessage handler. This vulnerability could enable an attacker to manipulate messages coming from unauthorized origins. The vendor has been notified but has not responded, increasing the risk of exploitation. Users are advised to take precautionary measures and remain vigilant against potential attacks exploiting this weakness.

Affected Version(s)

Toggl Track Extension 4.11.16

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82811 - Proof of Concept

References

https://vuldb.com/vuln/397230
vdb-entry
https://vuldb.com/vuln/397230/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82811
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

DRXYJ (VulDB User)
VulDB CNA Team
.