# CVE-2026-5383: runZero Explorer missing authorization check

> Attackers can access Explorer groups outside their authorized scope, potentially reading or modifying data.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Apr 2026
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-542q-mcfv-688v

## What is CVE-2026-5383?

CVE-2026-5383 is a medium-severity missing authorization vulnerability in runZero Explorer, published on 7 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

An issue that could allow access to Explorer groups from outside of the authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L (4.4 Medium). This issue was fixed in version 4.0.260208.0 of the runZero Explorer.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-5383?

It affects 1 product.


Products: Runzero Runzero Platform.

## How do I fix CVE-2026-5383?

No fix has been published for CVE-2026-5383 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5383 being exploited?

There is no known exploitation of CVE-2026-5383 in the wild and no public exploit code.

## Other vulnerabilities in runZero Explorer

- [CVE-2026-5373](https://insights.sbomify.com/CVE-2026-5373/): runZero Platform superuser privilege escalation (high 8.1)
- [CVE-2026-5372](https://insights.sbomify.com/CVE-2026-5372/): runZero Platform SQL injection in saved queries (medium 6.4)
- [CVE-2026-5376](https://insights.sbomify.com/CVE-2026-5376/): runZero Platform session timeout failure (medium 5.9)
- [CVE-2026-5374](https://insights.sbomify.com/CVE-2026-5374/): runZero Platform MCP information leak (medium 5.8)
- [CVE-2026-5378](https://insights.sbomify.com/CVE-2026-5378/): runZero Platform user creation leak (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5383 and fix it if it is affected.

What it is: CVE-2026-5383 is a medium-severity missing authorization vulnerability in runZero Explorer, published on 7 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-5383 in the wild and no public exploit code.

Affected product: runZero Explorer. 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-2026-5383/ (Markdown: https://insights.sbomify.com/CVE-2026-5383/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5383
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5383
- OSV: https://osv.dev/vulnerability/CVE-2026-5383

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5383/
Summaries are generated and may contain mistakes; the official description above is the record.