rclone: Directory metadata (chmod/chown/chtimes) applied through a planted symlink in rclone local --links escapes the destination

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-88016
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-10 16:18:08 UTC
Updated2026-09-10 16:18:08 UTC
Descriptionrclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, when backend/local runs with --links, a source .rclonelink object can plant a symlink in the destination and later directory metadata is applied through that path. MkdirMetadata, writeMetadataToFile, and setTimes operate when Directory.translatedLink=false, so os.Chown, os.Chmod, os.Chtimes, and birth-time handling can bypass os.Root confinement and follow the symlink. An attacker controlling source contents can therefore apply selected ownership, permissions, modification times, or birth times to a file or directory outside the destination, with --metadata required for chmod and chown while modification time is applied by the normal directory workflow. This issue is fixed in version 1.75.1.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

Problem Types: CWE-59 | CWE-281 | CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following') | CWE-281 CWE-281: Improper Preservation of Permissions

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Rclone Rclone affected < 1.75.1 Not specified

References

ReferenceSourceLinkTags
github.com/rclone/rclone/commit/17b0c03338a857bcb0a68d2d4c82ddbdec3f7893 [email protected] github.com
github.com/rclone/rclone/commit/a7ab39d3d1958afa1446982c1dc4e4a73a887e3e [email protected] github.com
github.com/rclone/rclone/releases/tag/v1.75.1 [email protected] github.com
github.com/rclone/rclone/security/advisories/GHSA-f8g7-2xjc-7mfh [email protected] github.com
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