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.

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…

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.

Affected products

Dokku — versions < 0.38.2

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC, 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.