CVE-2026-54004 Kirby: Access to files of top-level drafts is not protected by permissions
Unauthenticated attackers can access draft file contents via redirected URLs when file redirects are enabled, bypassing page access permissions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54004?
CVE-2026-54004 is a medium-severity missing authorization vulnerability in getkirby kirby, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites with content.fileRedirects enabled could redirect unauthenticated clean file URL requests for files stored in top-level draft pages to physical media URLs without checking page access permissions or preview tokens, leading to disclosure of draft file contents. This issue is fixed in versions 4.9.4 and 5.4.4.
Weakness: CWE-862
Which versions are affected by CVE-2026-54004?
4 open source packages ship an affected version, including getkirby/cms.
| Package | Affected | Fixed in |
|---|---|---|
getkirby/cms Packagist | All versions | 4.9.4 |
getkirby/cms Packagist | All versions | 4.9.4 |
getkirby/cms Packagist | From 5.0.0-alpha.1 | 5.4.4 |
getkirby/cms Packagist | From 5.0.0-alpha.1 | 5.4.4 |
How do I fix CVE-2026-54004?
Upgrade getkirby/cms to a fixed version for your release line: 4.9.4 or 5.4.4.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-54004 being exploited?
There is no known exploitation of CVE-2026-54004 in the wild and no public exploit code.
Sources
Also known as GHSA-89cp-7p28-jffg.