CVE-2026-45408: Dokku

Critical severity, CVSS 9.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Dokku is a docker-powered PaaS. Prior to 0.38.2, the app name validation regex (^[a-z0-9][^/:_A-Z]*$) permits shell metacharacters. When an authenticated user pushes to a git remote with a crafted app name, the name is embedded unquoted into a bash pre-receive hook script via an unquoted heredoc (<<EOF instead of <<'EOF') in fn-git-create-hook() at plugins/git/internal-functions:378. On git push, bash interprets the semicolon as a command separator, executing arbitrary commands as the dokku user. This vulnerability is fixed in 0.38.2.

Affected products

• Dokku Dokku: before 0.38.2 (fixed in 0.38.2)

Published 2026-06-26. Last modified 2026-06-26.