Vulnerability · Published Aug 31, 2026 · Assigned by VulDB
CVE-2026-82810extension.vn 2FA Authenticator Extension Background Service Worker chrome.runtime.onMessageExternal.addListener information disclosure
Low 3.3
In plain English
A low-severity information exposure in 2FA Authenticator Extension from extension.vn. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Official description
A weakness has been identified in extension.vn 2FA Authenticator Extension 1.0.0.2 on Chrome. The impacted element is the function chrome.runtime.onMessageExternal.addListener of the component Background Service Worker. Executing a manipulation of the argument sender.id can lead to information disclosure. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| extension.vn | 2FA Authenticator Extension | 1.0.0.2 |
Weakness: CWE-200, CWE-284 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
References
- VDB-397229 | extension.vn 2FA Authenticator Extension Background Service Worker chrome.runtime.onMessageExternal.addListener information disclosure vdb-entry, technical-description
- VDB-397229 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-82810 | CVE Analysis and Report third-party-advisory
- Submit #875249 | extension.vn 2FA Authenticator Chrome extension 1.0.0.2 Information Disclosure third-party-advisory
- https://github.com/xryj920/chrome_extensions/blob/main/extension.vn%202FA%20Authenticator%201.0.0.2%20exposes%20stored%20TOTP%20secrets%20through%20an%20unrestricted%20external%20message%20handler exploit