CVE-2026-54636: Dokku is a docker-powered PaaS

Q: How do I fix CVE-2026-54636?

dokku: upgrade to 0.38.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-54636 being exploited?

CVE-2026-54636 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54636 affect?

CVE-2026-54636 affects dokku. Severity is critical (CVSS 9.0). 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 limite

Q: How urgent is CVE-2026-54636?

Priority 48/100. Critical severity; On your watchlist

This month

CRITICAL 9.0WATCHLISTUPGRADE

CVE-2026-54636 is a critical-severity flaw (CVSS 9.0) affecting dokku. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-26
Last modified	2026-06-29

Publisher (CNA): GitHub, Inc. · Vendor: dokku

Last updated 2026-06-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-26 17:16 UTCPublished CVE record published
2026-06-29 14:16 UTCUpdated Record last modified

dokku dokku UPGRADE

Affected: < 0.38.7

Fixed in: 0.38.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dokku || rpm -q dokku || dokku --version

2. UPGRADE to 0.38.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dokku

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dokku

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54636?

dokku: upgrade to 0.38.7. Exact commands for each OS are on this page.

Is CVE-2026-54636 being exploited?

CVE-2026-54636 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54636 affect?

CVE-2026-54636 affects dokku. Severity is critical (CVSS 9.0). 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 limite

How urgent is CVE-2026-54636?

Priority 48/100. Critical severity; On your watchlist

Software pages

Docker vulnerabilities

Related CVEs

CVE-2026-45408 CRITICAL 9.0 UPGRADE Dokku is a docker-powered PaaS
CVE-2026-45407 MEDIUM 5.0 UPGRADE Dokku is a docker-powered PaaS
CVE-2026-45406 CRITICAL 9.0 UPGRADE Dokku is a docker-powered PaaS
CVE-2026-45405 CRITICAL 9.0 UPGRADE Dokku is a docker-powered PaaS

References

← Back to latest CVEs