CVE-2026-45405Network attack vector

Arbitrary file write via tar symlink traversal

Published Jun 26, 2026 · Updated Jun 26, 2026

Archive extraction in Dokku before 0.38.2 allows remote authenticated users to write files as the dokku user via crafted archives. The git:from-archive and certs:add commands extract tar or zip members without rejecting unsafe paths or symlinks, and GNU tar follows an earlier symlink for later entries. Any Dokku user able to invoke either command can overwrite files writable by the dokku account, including authorized_keys for unrestricted shell access.

CVSS severity9.0
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Archive extraction in Dokku before 0.38.2 allows remote authenticated users to write files as the dokku user via crafted archives. The git:from-archive and certs:add commands extract tar or zip members without rejecting unsafe paths or symlinks, and GNU tar follows an earlier symlink for later entries. Any Dokku user able to invoke either command can overwrite files writable by the dokku account, including authorized_keys for unrestricted shell access.

The record

CVE
CVE-2026-45405
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Dokku
Product
Dokku
Classifications
CWE-59, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.38.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dokku · Dokkuversion=< 0.38.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo