Bug 2531800

Summary: CVE-2026-88046 rclone: rclone: Unauthorized data modification via path traversal in source object names [fedora-all]
Product: [Fedora] Fedora Reporter: Matteo Signorini <msignori>
Component: rcloneAssignee: Mikel Olasagasti Uranga <mikel>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: go-sig, mikel
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["75e61e25-5d94-4b26-a521-9d4f94b62753"]}
Fixed In Version: rclone-1.75.2-1.fc44 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-21 01:03:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2531548    

Description Matteo Signorini 2026-09-11 08:45:43 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
Comment 1 Fedora Update System 2026-10-11 09:37:13 UTC 
FEDORA-2026-7aab7a2bbe (rclone-1.75.2-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-7aab7a2bbe
Comment 2 Fedora Update System 2026-10-13 01:56:23 UTC 
FEDORA-2026-7aab7a2bbe has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-7aab7a2bbe`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-7aab7a2bbe

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2026-10-13 02:30:54 UTC 
FEDORA-2026-e27d24d18c has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-e27d24d18c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e27d24d18c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 4 Fedora Update System 2026-10-21 01:03:03 UTC 
FEDORA-2026-e27d24d18c (rclone-1.75.2-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.