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CVE-2026-71309— rclone: Incomplete path validation allows backend root escape in serve restic

Quick assessment

Affected
rclone rclone
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.

Rclone是Rclone团队开源的一个支持多协议的数据同步工具。 Rclone 1.40.0版本至1.75.0之前版本存在路径遍历漏洞，该漏洞源于未正确拒绝以../开头的URL路径，可能导致攻击者通过REST端点读取、创建、覆盖或删除配置路径之外的对象。

CVSS 8.6 · High EPSS 0.46% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
rclone rclone >= 1.40.0, < 1.75.0 affected
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I. Basic Information for CVE-2026-71309

Vulnerability Information
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Vulnerability Title
rclone: Incomplete path validation allows backend root escape in serve restic
Source: CVE Program / CVE List V5
Vulnerability Description
rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.40.0 until 1.75.0, rclone serve restic does not correctly reject URL paths beginning with ../ in cmd/serve/restic/restic.go WithRemote, which accepts a leading parent path and passes it to GET, HEAD, POST, and DELETE handlers for configured backends including WebDAV, FTP, HTTP, Memory, and SFTP. An attacker who can access the REST endpoint may read, create, overwrite, or delete objects outside the path configured by the operator when the operator publishes a backend subdirectory and the backend credential can access parent or sibling objects. This issue is fixed in 1.75.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Rclone 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rclone是Rclone团队开源的一个支持多协议的数据同步工具。 Rclone 1.40.0版本至1.75.0之前版本存在路径遍历漏洞，该漏洞源于未正确拒绝以../开头的URL路径，可能导致攻击者通过REST端点读取、创建、覆盖或删除配置路径之外的对象。
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
rclone rclone >= 1.40.0, < 1.75.0 -

II. Public POCs for CVE-2026-71309

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7701 chars
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III. Intelligence Information for CVE-2026-71309

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Patches & Fixes for CVE-2026-71309 (1)

Vendor Advisories for CVE-2026-71309 (1)

Vendor Pages for CVE-2026-71309 (1)

Same Patch Batch · rclone · 2026-08-05 · 5 CVEs total

CVE-2026-71312 8.0 HIGH rclone: PowerShell Smart-Quote Filename Injection Enables SFTP Server-Side Command Executi
CVE-2026-71313 6.9 MEDIUM rclone: Local Encoding Path Traversal
CVE-2026-71311 6.4 MEDIUM rclone: FTP Command Arguments Permit CRLF Injection When Custom Encoding Preserves Newline
CVE-2026-71310 5.9 MEDIUM rclone: Unbounded HTTP CONNECT Response Headers Can Exhaust rclone Memory

IV. Related Vulnerabilities

Same product: rclone
Same vendor: rclone
Same weakness: CWE-22

V. Comments for CVE-2026-71309

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