CVE-2026-42137
MEDIUMCVSS 6.5/10EPSS 0.30%
Last modified
CVE-2026-42137 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Getkirby | Kirby | < 4.9.0 |
| Getkirby | Kirby | >= 5.0.0, < 5.4.0 |
References
- https://github.com/getkirby/kirby/releases/tag/4.9.0Release Notes
- https://github.com/getkirby/kirby/releases/tag/5.4.0Release Notes
- https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8cPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-42137?
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.
How severe is CVE-2026-42137?
CVE-2026-42137 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.
How do I fix CVE-2026-42137?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-42137?
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