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Vulnerability record · CVE-2026-41176 · published 23 April 2026

CVE-2026-41176: Rclone missing authentication for critical function vulnerability

Rclone · Rclone

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.

9.2 CVSS 4.0 Critical EPSS 3.2% · top 12.3% CWE-306 · Missing authentication for critical functionCWE-15 · CWE-15
9.2CVSS 4.0 base score
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References, 2 tagged exploit
15 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/config.go Product
https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/rcserver/rcserver.go Product
https://github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qx ExploitVendor Advisory
https://access.redhat.com/security/cve/CVE-2026-41176
https://bugzilla.redhat.com/show_bug.cgi?id=2460989
https://github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qx ExploitVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41176.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-88018Rclone improper authentication vulnerabilityrclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 config…EPSS 0.75%9.8CVE-2026-49980Rclone missing authentication for critical function vulnerabilityRclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.46.0 until 1.74.3, rclone rcd --…EPSS 0.78%9.2CVE-2026-41179Rclone os command injection vulnerabilityRclone is a command-line program to sync files and directories to and from different cloud storage providers. Starting in version 1.48.0 and prior to…EPSS 5.3%8.8CVE-2026-59733Rclone path traversal vulnerabilityRclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.74.4, rclone serve restic --…EPSS 0.55%8.8CVE-2026-54572Rclone link following vulnerabilityRclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.74.4, with -l/--links, rclon…EPSS 0.40%7.5CVE-2020-28924Rclone vulnerabilityAn issue was discovered in Rclone before 1.53.3. Due to the use of a weak random number generator, the password generator has been producing weak pas…EPSS 1.4%7.5CVE-2018-12907Rclone information exposure vulnerabilityIn Rclone 1.42, use of "rclone sync" to migrate data between two Google Cloud Storage buckets might allow attackers to trigger the transmission of an…EPSS 1.3%7.3CVE-2026-88017Rclone vulnerabilityrclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.64.0 until 1.75.1, the FTP auth-…EPSS 0.43%

Source: NIST National Vulnerability Database (record CVE-2026-41176), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.