Root escape via unvalidated source object names
Published Sep 10, 2026 · Updated Sep 10, 2026
Path traversal in rclone before 1.75.1 allows context-dependent attackers to write objects outside a configured destination root during transfers. Core transfer paths pass raw Object.Remote() values to affected destination backends, whose path.Join(root, remote) calls collapse parent-directory segments before EncodeDot can neutralize them. Exploitation requires a crafted object name in a source store processed by the victim; resulting copies can reach another bucket, share, or path available to the victim credential.
Summary
What happened
Path traversal in rclone before 1.75.1 allows context-dependent attackers to write objects outside a configured destination root during transfers. Core transfer paths pass raw Object.Remote() values to affected destination backends, whose path.Join(root, remote) calls collapse parent-directory segments before EncodeDot can neutralize them. Exploitation requires a crafted object name in a source store processed by the victim; resulting copies can reach another bucket, share, or path available to the victim credential.
The record
- CVE
- CVE-2026-88046
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- Rclone
- Product
- rclone
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.75.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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