CVE-2026-41176: Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
Vulnerability summary
CVE-2026-41176 is a critical (CVSS 9.8) vulnerability in rclone. EPSS estimates a 3.22% chance of exploitation in the next 30 days, higher than 88.1% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 4 · Related 5Timeline
- 22-04-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
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 metrics
11 scores · 7 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.2CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- OSV · WolfiEcosystem advisory · calculated9.2CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- OSV · GoEcosystem advisory · calculated9.2CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- OSV · ChainguardEcosystem advisory · calculated9.2CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- NVDNIST9.2CriticalCVSS: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:X/V:X/RE:X/U:X
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · GoEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.22%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
Decrease -29.50 pp
From 32.71% on 22-09-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
1 foundRclone
Maturity: poc
Weaknesses
CWE · root cause- CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
- CWE-15External Control of System or Configuration SettingOne or more system settings or configuration elements can be externally controlled by a user.
Affected systems
Chainguard5 products
- telegraf-1.35All versions (No fix recorded)
- telegraf-1.36All versions (No fix recorded)
- telegraf-1.37All versions (No fix recorded)
- telegraf-1.38< 1.38.4-r19
- telegraf-1.39< 1.39.1-r0
Wolfi3 products
- telegraf-1.36All versions (No fix recorded)
- telegraf-1.37All versions (No fix recorded)
- telegraf-1.38< 1.38.4-r19
Debian1 product
- rcloneAll versions (No fix recorded)
Github.com/rclone1 product
- rclone≥ 1.45.0, < 1.73.5 | < 1.73.5
Rclone1 product
- rclone≥ 1.45.0, < 1.73.5 | ≥ 1.45, < 1.73.5
Ubuntu1 product
- rclone< 1.50.2-2ubuntu0.2+esm1 | < 1.53.3-4ubuntu1.22.04.4 | < 1.60.1+dfsg-3ubuntu0.24.04.5 | < 1.60.1+dfsg-4ubuntu2.1 | All versions (No fix recorded) | < 1.60.1+dfsg-4ubuntu3.1
6 vendors · 12 products
References
13 links- github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qxX Refsource CONFIRMREPORTAdvisoryWEBExploitVendor Advisory
- github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/config.goX Refsource MISCWEBProduct
- github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/rcserver/rcserver.goX Refsource MISCWEBProduct
Show all 13 references
- github.com/rclone/rclonePACKAGE