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CVE-2026-45405— Dokku: Arbitrary File Write via Tar Symlink Traversal in git:from-archive and certs:add

Quick assessment

Affected
dokku dokku
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dokku Dokku是Dokku团队的一个云平台部署工具。 Dokku 0.38.2之前版本存在后置链接漏洞，该漏洞源于git:from-archive和certs:add命令在处理用户提供的tar/zip存档时，未清理成员路径或阻止符号链接遍历，攻击者可利用该漏洞在dokku用户可写位置写入任意文件，包括覆盖~/.ssh/authorized_keys以获取不受限制的shell访问权限。

CVSS 9.0 · Critical EPSS 0.46% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
dokku dokku < 0.38.2 affected
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I. Basic Information for CVE-2026-45405

Vulnerability Information
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Vulnerability Title
Dokku: Arbitrary File Write via Tar Symlink Traversal in git:from-archive and certs:add
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Dokku 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dokku Dokku是Dokku团队的一个云平台部署工具。 Dokku 0.38.2之前版本存在后置链接漏洞，该漏洞源于git:from-archive和certs:add命令在处理用户提供的tar/zip存档时，未清理成员路径或阻止符号链接遍历，攻击者可利用该漏洞在dokku用户可写位置写入任意文件，包括覆盖~/.ssh/authorized_keys以获取不受限制的shell访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dokku dokku < 0.38.2 -

II. Public POCs for CVE-2026-45405

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6769 chars
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Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-45405

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Patches & Fixes for CVE-2026-45405 (1)

Vendor Advisories for CVE-2026-45405 (1)

Same Patch Batch · dokku · 2026-06-26 · 5 CVEs total

CVE-2026-45408 9.0 CRITICAL Dokku: OS Command Injection via App Name in Git Pre-Receive Hook
CVE-2026-45406 9.0 CRITICAL Dokku: Host RCE via Maliciously Named OpenResty Include Files Injected Through eval
CVE-2026-54636 9.0 CRITICAL Dokku: OS Command Injection via app.json managed Cron
CVE-2026-45407 5.0 MEDIUM Dokku: Git Credentials in .netrc Stored World-Readable Due to Premature touch

IV. Related Vulnerabilities

Same product: dokku
Same vendor: dokku
Same weakness: CWE-59

V. Comments for CVE-2026-45405

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