CVE-2026-116191
Description
A flaw was found in Rclone's Web Distributed Authoring and Versioning (WebDAV) service. Due to improper validation of directory traversal sequences, a remote, unauthenticated attacker can send specially crafted WebDAV requests containing directory traversal sequences. This vulnerability allows the attacker to plant directory nodes and create, overwrite, or delete files outside the intended root directory, potentially compromising data belonging to other tenants.
Statement
This vulnerability is rated as an Important severity flaw because an unauthenticated network entity can escape the configured directory root to modify or delete arbitrary host files, resulting in a high integrity impact. In typical Red Hat product deployments, rclone functions as a client-side file synchronization tool rather than a persistent network-facing server. Practical exploitation is therefore limited to environments that explicitly launch the WebDAV listener and expose it to untrusted network access.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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 | 7.5 | N/A | 7.5 |
| 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 | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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