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TI-2026-29799 Aliases CVE-2026-41176GHSA-25qr-6mpr-f7qx

Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution

Priority HIGH 81CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.32715 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed rclone (rclone): 1.73.5github.com/rclone/rclone (Go): 1.73.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
rclonerclone1.45.0 to before 1.73.51.73.5Patch availableCNA
—github.com/rclone/rclone (Go)1.45.0 to before 1.73.51.73.5Patch availableGHSA-25qr-6mpr-f7qx
  • rclone Vendorrclone Affected 1.45.0 to before 1.73.5 Fixed in 1.73.5 Patch available CNA
  • github.com/rclone/rclone (Go) Vendor— Affected 1.45.0 to before 1.73.5 Fixed in 1.73.5 Patch available GHSA-25qr-6mpr-f7qx

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:*1.45 to before 1.73.5Vulnerablerclone
  • cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:* Versions 1.45 to before 1.73.5 Vulnerable ·rclone

Remediation

  • Fix · CNA rclone (rclone) Fixed in 1.73.5
  • Fix · GHSA-25qr-6mpr-f7qx github.com/rclone/rclone (Go) Fixed in 1.73.5 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 2 products
  • OpenShift API for Data Protection
  • Red Hat Advanced Cluster Management for Kubernetes 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41176
  2. 2026-10-03 Alias added: GHSA-25qr-6mpr-f7qx
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Exploit 1

Advisory 1

Other 3

  • TI-2026-60044 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass CVSS 3.1CRITICAL 9.8
  • TI-2026-29802 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution CVSS 4.0CRITICAL 9.2
  • TI-2026-42602 Path traversal in rclone CVSS 3.1HIGH 8.8
  • TI-2026-39407 rclone: Unvalidated symlink target in local `--links` — arbitrary file write from an untrusted remote CVSS 3.1HIGH 8.8
  • TI-2026-80211 Authentication bypass in rclone serve webdav via OPTIONS requests CVSS 4.0MEDIUM 6.9
  • TI-2026-80206 Integer overflow in rclone serve s3 lets attackers exhaust memory CVSS 4.0MEDIUM 6.9
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences