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CVE-2026-55168— Runtipi: Authenticated arbitrary file write via backup restore symlink planting

Quick assessment

Affected
runtipi runtipi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Runtipi是Runtipi团队开源的一款硬件服务器管理平台。 Runtipi 4.10.1之前版本存在后置链接漏洞，该漏洞源于备份恢复流程中接受攻击者控制的符号链接并复制到实时应用路径，可能导致已认证攻击者在预期恢复和用户配置目录边界之外写入任意内容。

CVSS 6.5 · Medium EPSS 0.61% · P49

Possible ATT&CK Techniques 1 AI

T1222.001 · Windows Permissions

Affected Version Matrix 1

VendorProduct Version RangeStatus
runtipi runtipi < 4.10.1 affected
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I. Basic Information for CVE-2026-55168

Vulnerability Information
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Vulnerability Title
Runtipi: Authenticated arbitrary file write via backup restore symlink planting
Source: CVE Program / CVE List V5
Vulnerability Description
Runtipi is a personal homeserver orchestrator. In 4.10.0 and earlier, Runtipi accepts symbolic links from an attacker-controlled backup archive and copies them into live application paths during the backup restore flow. An authenticated attacker can plant user-config/app.env as a symlink to an arbitrary reachable path and then send PUT /api/user-config/demoapp3:_user with attacker-controlled appEnv content. FilesystemService.writeTextFile() follows the planted link, allowing content to be written outside the intended restore and user-config directory boundary with Runtipi process permissions. This issue is fixed in version 4.10.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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
Runtipi 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Runtipi是Runtipi团队开源的一款硬件服务器管理平台。 Runtipi 4.10.1之前版本存在后置链接漏洞，该漏洞源于备份恢复流程中接受攻击者控制的符号链接并复制到实时应用路径，可能导致已认证攻击者在预期恢复和用户配置目录边界之外写入任意内容。
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
runtipi runtipi < 4.10.1 -

II. Public POCs for CVE-2026-55168

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III. Intelligence Information for CVE-2026-55168

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Patches & Fixes for CVE-2026-55168 (2)

Vendor Advisories for CVE-2026-55168 (1)

Vendor Pages for CVE-2026-55168 (1)

IV. Related Vulnerabilities

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