CVE-2026-116193
Description
A flaw was found in Rclone. This flaw allows an unauthenticated remote attacker to achieve information disclosure by bypassing authentication checks in the WebDAV (Web Distributed Authoring and Versioning) service. By sending HTTP OPTIONS requests to arbitrary paths and analyzing the returned Allow header values, an attacker can determine whether specific files or directories exist on the server.
Statement
This vulnerability is rated as Moderate impact because the flaw is confined to namespace enumeration—revealing whether specific files or directories exist—without permitting unauthorized reading of file contents or modification of data. Red Hat products are only exposed if the integrated Rclone binary is actively configured to run the WebDAV service accessible to untrusted network traffic. In typical Red Hat deployments such as Red Hat Advanced Cluster Management (VolSync) and Cryostat, Rclone operates internally for data movement and volume replication rather than serving an external WebDAV interface.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | N/A | 5.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Understanding the Weakness (CWE)
Access Control,Other
Technical Impact: Gain Privileges or Assume Identity; Varies by Context
Exposing critical functionality essentially provides an attacker with the privilege level of that functionality. The consequences will depend on the associated functionality, but they can range from reading or modifying sensitive data, accessing administrative or other privileged functionality, or possibly even executing arbitrary code.
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