CVE-2026-41176 (GCVE-0-2026-41176)

Vulnerability from cvelistv5 – Published: 2026-04-22 23:57 – Updated: 2026-07-15 00:59
VLAI Shadowserver Previdian
Title
Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
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.
Severity
9.2 (Critical)
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
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-24 00:00 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-15 - External Control of System or Configuration Setting
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rclone rclone Affected: >= 1.45.0, < 1.73.5
guessed Create a notification for this product.
Red Hat OpenShift API for Data Protection     cpe:/a:redhat:openshift_api_data_protection:1
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
Create a notification for this product.
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: d451776f-25e5-4c7f-bc0f-fc957d075a48

Vulnerability ID: CVE-2026-41176

Status: Confirmed

Status Updated: 2026-11-06 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2026-05-13
Asserted: 2026-05-13
Last Seen: 2026-11-06
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Rclone / Rclone | Class: other-software | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-11-06: 2
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class other-software
7D Avg 0
Vendor Rclone
30D Avg 1
90D Avg 0
Product Rclone
Cisa Kev no
Connections 2
Observation Date 2026-11-06
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-07-01 05:54 UTC | Updated: 2026-11-08 01:03 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6a4cdf26-e033-4f06-b832-6597211e98d6

Vulnerability ID: CVE-2026-41176

Status: Confirmed

Status Updated: 2026-06-03 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-03
Asserted: 2026-06-03
Scope
Notes: KEVIntel entry: Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution | Affected: rclone / rclone | CVSS: 9.2 (CRITICAL) | EPSS: 0.35437 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
Vendor rclone
Product rclone
Added Date 2026-06-03T00:00:00.000Z
Cvss Score 9.2
Epss Score 0.35437
Cvss Severity CRITICAL
Epss Percentile 0.98248
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-19 12:42 UTC | Updated: 2026-06-19 12:42 UTC
Show details on NVD website
To clipboard 

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            "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
            "url": "https://access.redhat.com/security/cve/CVE-2026-41176"
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            "tags": [
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              "Vendor Advisory"
            ],
            "url": "https://github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qx"
          },
          {
            "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41176.json"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
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                "lang": "en",
                "value": "CWE-306"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-15"
              }
            ],
            "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-30T03:55:54+00:00",
      "cve": "CVE-2026-41176",
      "id": "CVE-2026-41176",
      "initial_release_date": "2026-04-22T23:57:54.075000+00:00",
      "product_status:known_not_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "github.com/rclone/rclone: Rclone: Unauthorized access to administrative functions through unauthenticated Remote Control endpoint.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41176.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-41176",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-23T14:36:39.313605Z",
                    "version": "2.0.3"
                  },
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              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-04-23T14:36:04.300Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
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                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/rclone/rclone/security/advisories/GHSA-25qr-6mpr-f7qx"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "rclone",
              "vendor": "rclone",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003e= 1.45.0, \u003c 1.73.5"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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."
            }
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          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 9.2,
                "baseSeverity": "CRITICAL",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH"
              }
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            {
              "descriptions": [
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                  "cweId": "CWE-306",
                  "description": "CWE-306: Missing Authentication for Critical Function",
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          "providerMetadata": {
            "dateUpdated": "2026-04-22T23:57:54.075Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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            {
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              "tags": [
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              "url": "https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/config.go"
            },
            {
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              "tags": [
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              ],
              "url": "https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/rcserver/rcserver.go"
            }
          ],
          "source": {
            "advisory": "GHSA-25qr-6mpr-f7qx",
            "discovery": "UNKNOWN"
          },
          "title": "Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-41176",
        "datePublished": "2026-04-22T23:57:54.075Z",
        "dateReserved": "2026-04-17T16:34:45.526Z",
        "dateUpdated": "2026-04-28T03:55:19.022Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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Vulnerability timeline

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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