CVE-2026-45408: Dokku is a docker-powered PaaS

Q: How do I fix CVE-2026-45408?

dokku: upgrade to 0.38.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-45408 being exploited?

CVE-2026-45408 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-2026-45408 affect?

CVE-2026-45408 affects dokku. Severity is critical (CVSS 9.0). 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 int

Q: How urgent is CVE-2026-45408?

Priority 45/100. Critical severity; On your watchlist

This month

CRITICAL 9.0WATCHLISTUPGRADE

CVE-2026-45408 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 0.38.2, 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 separat

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	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-06-26
Last modified	2026-06-26

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

Last updated 2026-06-26 · 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
2026-06-26 19:16 UTCUpdated Record last modified

dokku dokku UPGRADE

Affected: < 0.38.2

Fixed in: 0.38.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.38.2 (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-2026-45408?

dokku: upgrade to 0.38.2. Exact commands for each OS are on this page.

Is CVE-2026-45408 being exploited?

CVE-2026-45408 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-2026-45408 affect?

CVE-2026-45408 affects dokku. Severity is critical (CVSS 9.0). 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 int

How urgent is CVE-2026-45408?

Priority 45/100. Critical severity; On your watchlist

Software pages

Docker vulnerabilities · Git vulnerabilities

Related CVEs

CVE-2026-54636 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