# CVE-2026-82810: Information disclosure in 2FA Authenticator Extension

> A local attacker can exploit the background service worker to disclose sensitive information from the 2FA Authenticator Extension.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Aug 2026
- **Updated:** 2 Sep 2026
- **Also known as:** GHSA-7rrg-c5fp-7863

## What is CVE-2026-82810?

CVE-2026-82810 is a medium-severity vulnerability in extension.vn 2FA Authenticator Extension, published on 31 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### 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.

Weakness: CWE-284 (Improper Access Control), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-82810?


## How do I fix CVE-2026-82810?

No fix has been published for CVE-2026-82810 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82810 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82810 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82810 and fix it if it is affected.

What it is: CVE-2026-82810 is a medium-severity vulnerability in extension.vn 2FA Authenticator Extension, published on 31 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82810 exists.

Affected product: extension.vn 2FA Authenticator Extension. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-82810/ (Markdown: https://insights.sbomify.com/CVE-2026-82810/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82810
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82810
- OSV: https://osv.dev/vulnerability/CVE-2026-82810

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82810/
Summaries are generated and may contain mistakes; the official description above is the record.