Critical severity · published Apr 22, 2026
CVE-2026-41176
Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
9.8
CVSS
32.7%
EPSS
No
On KEV
Description
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. The RC endpoint `options/set` is exposed without `AuthRequired: true`, but it can mutate global runtime configuration, including the RC option block itself. Starting in version 1.45.0 and prior to version 1.73.5, an unauthenticated attacker can set `rc.NoAuth=true`, which disables the authorization gate for many RC methods registered with `AuthRequired: true` on reachable RC servers that are started without global HTTP authentication. This can lead to unauthorized access to sensitive administrative functionality, including configuration and operational RC methods. Version 1.73.5 patches the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)32.7% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
rclone · rclone
>= 1.45.0, < 1.73.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41176
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41176
Product
https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/config.go
Product
https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/rcserver/rcserver.go
Exploit
https://github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qx
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-41176
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2460989
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41176.json
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