Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M

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

Medium 5.3

In plain English

A medium-severity path traversal in rclone from rclone. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 77.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	rclone	no fix listed	DEBIAN-CVE-2026-88046
Debian:13	rclone	no fix listed	DEBIAN-CVE-2026-88046
Go	github.com/rclone/rclone	1.75.1	GHSA-38xv-hf3p-h7mq
Go	github.com/rclone/rclone	1.75.1	GO-2026-6457
Ubuntu:26.10	rclone	no fix listed	UBUNTU-CVE-2026-88046

Affected products (as reported)

Vendor	Product	Versions
rclone	rclone	< 1.75.1

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References

https://github.com/rclone/rclone/security/advisories/GHSA-38xv-hf3p-h7mq x_refsource_CONFIRM
https://github.com/rclone/rclone/commit/57842c5ee4e1407eda06a414a36510cce2db4252 x_refsource_MISC
https://github.com/rclone/rclone/releases/tag/v1.75.1 x_refsource_MISC