RCE in Dokku
CVE-2026-54636
Dokku is a docker-powered PaaS. Prior to 0.38.7, the cron plugin utilizes commands in the app.json file to manage system cron running as the Dokku user. An app.json cron command utilizing special shell characters - including, but not limited to, > or ; - can break out of the Docker container and execute commands on the host as the Dokku user. This vulnerability is fixed in 0.38.7.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Dokku — versions < 0.38.7
Weakness classification (CWE)
References
- github.com/dokku/dokku/security/advisories/GHSA-72vm-7pc2-x95w (Vendor Advisory)
- github.com/dokku/dokku/pull/8672 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-54636?
- CVE-2026-54636 is a critical-severity vulnerability in Dokku, classified under OS Command Injection. CVSS score: 9.0/10. Published 2026-06-26.
- How severe is CVE-2026-54636?
- Critical severity. CVSS v3 base score is 9.0 out of 10.