# CVE-2026-18283: Sony XAV-9500ES udev USB Rules Authorization Bypass Vulnerability

> Physically present attackers can bypass authorization on Sony XAV-9500ES devices by connecting a crafted USB device that triggers restricted device instantiation.

- **Severity:** Low 2.4 (`CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-j2pg-r74g-f5v5

## What is CVE-2026-18283?

CVE-2026-18283 is a low-severity authentication bypass vulnerability in Sony XAV-9500ES, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Sony XAV-9500ES udev USB Rules Authorization Bypass Vulnerability. This vulnerability allows physically present attackers to bypass authorization on affected installations on Sony XAV-9500ES devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the udev rules. A crafted USB device connected to the system can trigger instantiation of otherwise restricted USB device types. An attacker can leverage this vulnerability to bypass authorization on the system. Was ZDI-CAN-28992.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-18283?


## How do I fix CVE-2026-18283?

No fix has been published for CVE-2026-18283 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18283 being exploited?

There is no known exploitation of CVE-2026-18283 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18283 and fix it if it is affected.

What it is: CVE-2026-18283 is a low-severity authentication bypass vulnerability in Sony XAV-9500ES, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18283 in the wild and no public exploit code.

Affected product: Sony XAV-9500ES. 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-2026-18283/ (Markdown: https://insights.sbomify.com/CVE-2026-18283/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18283
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18283
- OSV: https://osv.dev/vulnerability/CVE-2026-18283

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18283/
Summaries are generated and may contain mistakes; the official description above is the record.