Vulnerability in Dokku
CVE-2026-45405
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.
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 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% 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 < 0.38.2
Weakness classification (CWE)
References
- github.com/dokku/dokku/security/advisories/GHSA-j6qq-xg73-ghqg (Vendor Advisory)
- github.com/dokku/dokku/pull/8591 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-45405?
- CVE-2026-45405 is a critical-severity vulnerability in Dokku, classified under Improper Link Resolution Before File Access. CVSS score: 9.0/10. Published 2026-06-26.
- How severe is CVE-2026-45405?
- Critical severity. CVSS v3 base score is 9.0 out of 10.