TI-2026-33194 Aliases CVE-2026-45405

Dokku: Arbitrary File Write via Tar Symlink Traversal in git:from-archive and certs:add

MEDIUM 41CWE-59Published 2026-06-26 · Updated 2026-06-26

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Dokku is a docker-powered PaaS. Prior to 0.38.2, the git:from-archive and certs:add commands extract user-supplied tar/zip archives into temporary directories without sanitizing member paths or preventing symlink traversal. GNU tar creates symlinks during extraction and follows them for subsequent entries, allowing an attacker to write arbitrary files anywhere writable by the dokku user — including overwriting ~/.ssh/authorized_keys to gain unrestricted shell access. This vulnerability is fixed in 0.38.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00458 39th percentileScored 2026-11-07

Fix Fixed dokku (dokku): 0.38.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
dokku	dokku	before 0.38.2	0.38.2	Patch available	CNA

dokku Vendordokku Affected before 0.38.2 Fixed in 0.38.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:dokku:dokku:::::-:::*	before 0.38.2	Vulnerable	dokku

cpe:2.3:a:dokku:dokku:*:*:*:*:-:*:*:* Versions before 0.38.2 Vulnerable ·dokku

Remediation

Fix · CNA dokku (dokku) Fixed in 0.38.2

Timeline

2026-10-02 Threatist record created from CVE-2026-45405

References

Patch 1

https://github.com/dokku/dokku/pull/8591

Advisory 1

https://github.com/dokku/dokku/security/advisories/GHSA-j6qq-xg73-ghqg

TI-2026-39465 Dokku: OS Command Injection via app.json managed Cron CVSS 3.1CRITICAL 9.9
TI-2026-33197 Dokku: OS Command Injection via App Name in Git Pre-Receive Hook CVSS 3.1CRITICAL 9.0
TI-2026-33195 Dokku: Host RCE via Maliciously Named OpenResty Include Files Injected Through eval CVSS 3.1CRITICAL 9.0
TI-2026-33196 Dokku: Git Credentials in .netrc Stored World-Readable Due to Premature touch CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences