rclone before 1.75.1 fails to confine names from server and third-party listing responses to the listed directory, allowing path traversal sequences… (CVE-2026-93986)
rclone versions before 1.75.1 do not properly confine file names from server and third-party listing responses to the intended directory. This allows path traversal sequences in object names, potentially enabling crafted names with forward slashes and parent directory references to write outside the destination root. However, local backend protections currently block actual file escape.
AI Analysis
Technical Summary
The vulnerability in rclone prior to version 1.75.1 involves improper confinement of names received from server and third-party listing responses. Attackers can exploit this by crafting object names containing path traversal sequences (e.g., ../) and forward slashes, which could lead to writing files outside the intended directory root. Despite this, downstream protections in the local backend currently prevent actual file system escape, limiting the impact.
Potential Impact
The vulnerability allows potential path traversal in object names, which could lead to unauthorized writes outside the designated directory. However, due to existing local backend protections, actual file system escape is currently blocked, reducing the risk of exploitation. The CVSS score is 3.1 (medium severity), indicating limited impact primarily on integrity with no confidentiality or availability impact.
Mitigation Recommendations
A fix is available in rclone version 1.75.1. Users should upgrade to version 1.75.1 or later to address this issue. Until then, local backend protections mitigate the risk by blocking actual file escape. No additional immediate action is required beyond applying the official update.
rclone before 1.75.1 fails to confine names from server and third-party listing responses to the listed directory, allowing path traversal sequences… (CVE-2026-93986)
Description
rclone versions before 1.75.1 do not properly confine file names from server and third-party listing responses to the intended directory. This allows path traversal sequences in object names, potentially enabling crafted names with forward slashes and parent directory references to write outside the destination root. However, local backend protections currently block actual file escape.
CVSS v3.1
Score 3.1low
Affected software
pkg:deb/ubuntu/rclone?arch=source&distro=bionicpkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in rclone prior to version 1.75.1 involves improper confinement of names received from server and third-party listing responses. Attackers can exploit this by crafting object names containing path traversal sequences (e.g., ../) and forward slashes, which could lead to writing files outside the intended directory root. Despite this, downstream protections in the local backend currently prevent actual file system escape, limiting the impact.
Potential Impact
The vulnerability allows potential path traversal in object names, which could lead to unauthorized writes outside the designated directory. However, due to existing local backend protections, actual file system escape is currently blocked, reducing the risk of exploitation. The CVSS score is 3.1 (medium severity), indicating limited impact primarily on integrity with no confidentiality or availability impact.
Mitigation Recommendations
A fix is available in rclone version 1.75.1. Users should upgrade to version 1.75.1 or later to address this issue. Until then, local backend protections mitigate the risk by blocking actual file escape. No additional immediate action is required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-93986
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:Pro:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6ab4be27f7a7c54106eee998
Added to database: 09/24/2026, 06:07:35 UTC
Last enriched: 09/24/2026, 06:22:19 UTC
Last updated: 09/25/2026, 01:47:46 UTC
Views: 7
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