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Fencer Vulns
critical 9.8

CVE-2026-41179 json

RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution

published 2026-04-22 6 mo ago modified 2026-09-10 1 mo ago also BIT-rclone-2026-41179 , EUVD-2026-25144 , GHSA-jfwf-28xr-xw6q , GO-2026-5466 , JLSEC-2026-281

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
8.6%
EPSS 8.6% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known, plus a Nuclei check

Summary

Rclone 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 version 1.73.5, the RC endpoint `operations/fsinfo` is exposed without `AuthRequired: true` and accepts attacker-controlled `fs` input. Because `rc.GetFs(...)` supports inline backend definitions, an unauthenticated attacker can instantiate an attacker-controlled backend on demand. For the WebDAV backend, `bearer_token_command` is executed during backend initialization, making single-request unauthenticated local command execution possible on reachable RC deployments without global HTTP authentication. Version 1.73.5 patches the issue.

Patch / fix

  • go github.com/rclone/rclone 1.73.5
  • bitnami rclone 1.73.5
  • julia Rclone_jll 1.73.5+0
  • rclone rclone 1.73.5
  • rclone Ubuntu 24.04 LTS 1.60.1+dfsg-3ubuntu0.24.04.5
  • rclone Ubuntu 25.10 1.60.1+dfsg-4ubuntu2.1
  • rclone Ubuntu 26.04 LTS 1.60.1+dfsg-4ubuntu3.1

ubuntu advisories UBUNTU-CVE-2026-41179

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • govulncheck-vulndb SLES for SAP applications 16.0, SLES 16.0 0.0.20260827T195228-160000.1.1

suse advisories SUSE-SU-2026:23625-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260827T195228-160000.1.1
  • rclone openSUSE Leap 16.0 1.74.4-bp160.1.1
  • rclone openSUSE Tumbleweed 1.73.5-1.1

opensuse advisories openSUSE-SU-2026:21761-1openSUSE-SU-2026:21436-1openSUSE-SU-2026:10584-1

  • rclone Alpine 3.24 1.73.5-r0

alpine advisories ALPINE-CVE-2026-41179

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41179 updated cvss 9.8

github.com/rclone/rclone: Rclone: Unauthenticated local command execution via exposed RC endpoint

  • Red Hat OpenShift API for Data Protection oadp/oadp-velero-rhel9, oadp/oadp-mustgather-rhel9, oadp/oadp-velero-restic-restore-helper-rhel9
    not affected: vulnerable code not present
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
6 mo ago

Exploit prediction

8.58% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template RClone RC - Command Injection nuclei detection template
  • github.com https://github.com/rclone/rclone/security/advisories/GHSA-jfwf-28xr-xw6q referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 9.2 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
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.2 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:X/V:X/RE:X/U:X
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/rclone/rclone
>=1.48.0, <1.73.5
>=1.49.0, <1.73.5
1.73.5
bitnami rclone
>=1.48.0, <1.73.5
1.73.5
go github.com/ncw/rclone
>=1.48.0
 no fix listed
julia Rclone_jll
<1.73.5+0
1.73.5+0

Affected products

  • rclone rclone
  • Red Hat OpenShift API for Data Protection
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.