CVE-2026-116187

MEDIUM 5.0

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads

CVSS Score

5.0

EPSS Score

0.0%

EPSS Percentile

0th

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

CWE	CWE-639
Vendor	rclone
Product	rclone
Published	Oct 25, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Affected Versions

rclone / rclone

1.68.0 < 1.75.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rclone/rclone/security/advisories/GHSA-35g6-9fjv-rmx5 vulncheck.com: https://www.vulncheck.com/advisories/rclone-1.68.0-before-1.75.2-authorization-bypass-in-serve-s3-multipart-uploads

Credits

🔍 torjan0 ncw