NVD / CVE Program· CNA GitHub_M

CVE-2026-41176: Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution

Noroxi assessment

Priority: Plan (action score 46/100)

A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Public proof-of-concept code exists (Exploit-DB / GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 32.7% (FIRST EPSS); higher than 98.3% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: github.com/rclone/rclone (Go) 1.73.5; rclone (openSUSE:Tumbleweed) 1.73.5-1.1.

Add it to your regular patch cycle. Upgrade to github.com/rclone/rclone (Go) 1.73.5; rclone (openSUSE:Tumbleweed) 1.73.5-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

CriticalCVSS 9.2 · v4.0—Proof of concept Fix available

Published: Apr 22, 2026
Updated: Jul 15, 2026
EPSS: 32.7% · 98th percentile
CWE: CWE-306

Report tools

JSON

Action score

Plan

Add it to your regular patch cycle.

CVSS: 36 / 40 · 9.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 10 / 30 · 32.7%

CISA SSVC decision

Exploitation: proof of concept
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 9.2; NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
rclone	rclone	cpe:2.3:a:rclone:rclone

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

rclone rclone1.45 and later · before 1.73.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

rclone rclone
- >= 1.45.0, < 1.73.5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	rclone	from 0	—
Go	github.com/rclone/rclone	from 1.45.0 · before 1.73.5	1.73.5
Go	github.com/rclone/rclone	before 1.73.5	1.73.5
openSUSE:Tumbleweed	rclone	before 1.73.5-1.1	1.73.5-1.1

Same product

rclone: all records

Other highest-scoring records for the same primary product.

CVE-2026-88018rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass
39Monitor
CVE-2026-49980Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
39Monitor
CVE-2026-41179RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution
39Monitor

Published before and after this one in the same product

← EarlierCVE-2020-28924Nov 19, 2020 · An issue was discovered in Rclone before 1.53.3.
30Monitor
← EarlierCVE-2024-52522Nov 15, 2024 · Rclone Improper Permission and Ownership Handling on Symlink Targets with --links and --metadata
21Monitor
Later →CVE-2026-54572Jul 14, 2026 · rclone: Unvalidated symlink target in local `--links` — arbitrary file write from an untrusted remote
35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Go:github.com/rclone/rclone	1.73.5	Package registry (OSV)
opensuse:rclone	1.73.5-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Nuclei detection template ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Nuclei detection template	Nuclei template CVE-2026-41176	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-4998063 days apartRclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
39Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-5973383 days apartrclone `serve restic --private-repos` authorization bypass: `..` in the URL path lets an authenticated user read, overwrite and delete other users' repositories
35Monitor
CVE-2026-71309105 days apartrclone: Incomplete path validation allows backend root escape in serve restic
34Monitor
CVE-2026-71312105 days apartrclone: PowerShell Smart-Quote Filename Injection Enables SFTP Server-Side Command Execution
32Monitor
CVE-2026-93987150 days apartrclone serve docker Path Traversal via Volume Name
18Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

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-secondary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1// Added for the support team
2app.post("/maintenance/reset", resetDevice);

Fixed

1if (config.maintenanceEnabled) {
2  app.post(
3    "/maintenance/reset",
4    requireSession, requireRole("admin"), resetDevice
5  );
6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/config.go

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records