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CVE-2026-45408

Dokku command injection

9.0 CRITICALEPSS 0.42%
  1. Published26 Jun 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Dokku< 0.38.2

Remediation

Fixed in
Dokku≥ 0.38.2

References

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Frequently asked

Is CVE-2026-45408 being actively exploited?

CVE-2026-45408 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-45408?

CVE-2026-45408 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-45408?

Affected products include Dokku.

How do I fix CVE-2026-45408?

Upgrade affected software to a fixed version, for example Dokku 0.38.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-45408 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.