Medium severity · published Oct 25, 2026
CVE-2026-116187
Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads
New
5.0
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
rclone · rclone
1.68.0 before 1.75.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116187
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116187
github.com
https://github.com/rclone/rclone/security/advisories/GHSA-35g6-9fjv-rmx5
www.vulncheck.com
https://www.vulncheck.com/advisories/rclone-1.68.0-before-1.75.2-authorization-bypass-in-serve-s3-multipart-uploads
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