Vulnerability · Published May 9, 2026 · Assigned by GitHub_M
CVE-2026-42051Kirby: System API endpoint leaks license data and installed version to authenticated users
Medium 5.3
In plain English
A medium-severity missing authorization in kirby from getkirby. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)5.3Medium
Exploit odds (30 days)0.2%top 91.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | getkirby/cms | 4.9.0 | GHSA-x68m-c7jf-2572 |
| Packagist | getkirby/cms | 5.4.0 | GHSA-x68m-c7jf-2572 |
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/getkirby/kirby/security/advisories/GHSA-x68m-c7jf-2572 x_refsource_CONFIRM
- https://github.com/getkirby/kirby/releases/tag/4.9.0 x_refsource_MISC
- https://github.com/getkirby/kirby/releases/tag/5.4.0 x_refsource_MISC