# CVE-2020-26964: Missing authorization in Firefox

> Untrusted apps could access browser privileges via USB debugging on older Android versions due to missing SELinux enforcement.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 9 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3x56-fp32-hw97, UBUNTU-CVE-2020-26964

## What is CVE-2020-26964?

CVE-2020-26964 is a medium-severity missing authorization vulnerability in Mozilla Firefox Mobile, published on 9 Dec 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

If the Remote Debugging via USB feature was enabled in Firefox for Android on an Android version prior to Android 6.0, untrusted apps could have connected to the feature and operated with the privileges of the browser to read and interact with web content. The feature was implemented as a unix domain socket, protected by the Android SELinux policy; however, SELinux was not enforced for versions prior to 6.0. This was fixed by removing the Remote Debugging via USB feature from affected devices. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83.

## Which versions are affected by CVE-2020-26964?

It affects 1 product.


Products: Mozilla Firefox Mobile.

## How do I fix CVE-2020-26964?

Apply the vendor's patch.

## Is CVE-2020-26964 being exploited?

There is no known exploitation of CVE-2020-26964 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Firefox Mobile

- [CVE-2026-84135](https://insights.sbomify.com/CVE-2026-84135/): Other issue in Firefox Focus for Android (critical 9.8)
- [CVE-2024-43111](https://insights.sbomify.com/CVE-2024-43111/): Cross-site scripting in Firefox for iOS (critical 9.8)
- [CVE-2023-49060](https://insights.sbomify.com/CVE-2023-49060/): Information disclosure in Firefox for iOS (critical 9.8)
- [CVE-2026-92033](https://insights.sbomify.com/CVE-2026-92033/): Privilege escalation in Firefox for Android (high 8.8)
- [CVE-2026-84117](https://insights.sbomify.com/CVE-2026-84117/): Privilege escalation in Firefox for Android (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26964 and fix it if it is affected.

What it is: CVE-2020-26964 is a medium-severity missing authorization vulnerability in Mozilla Firefox Mobile, published on 9 Dec 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-26964 in the wild and no public exploit code.

Affected product: Mozilla Firefox Mobile. 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-2020-26964/ (Markdown: https://insights.sbomify.com/CVE-2020-26964/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26964
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26964
- OSV: https://osv.dev/vulnerability/CVE-2020-26964

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-26964/
Summaries are generated and may contain mistakes; the official description above is the record.