[CRITICAL] Craft CMS Vulnerable to Authenticated RCE via "craft.app.fs.write()" in Twig Templates

PKSA-jqb9-4xf5-mdn1 CVE-2026-28697 GHSA-v47q-jxvr-p68x

Affected package: craftcms/cms

Affected version: >=4.0.0-RC1,<4.17.0-beta.1|>=5.0.0-RC1,<5.9.0-beta.1

Reported by:
GitHub