[MEDIUM] Kirby: Access to image files outside of the site root via path traversal in the media handling

PKSA-cmzk-n5t6-2v3k CVE-2026-75592 GHSA-6j4c-mgqr-qv76

Affected package: getkirby/cms

Affected version: >=5.0.0,<5.5.2|<4.9.5

Reported by:
GitHub