What’s Vulnerable › Vulnerabilities

CVE-2026-116193: Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-25 · updated 2026-10-29
• Weakness: CWE-200

Description

Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.

Affected products

• rclone: from 1.64.0 before 1.75.2 — fixed in 1.75.2
• rclone: from 1.64.0 before 1.75.2 — fixed in 1.75.2

How to fix

Upgrade to a fixed version: rclone 1.75.2; rclone 1.75.2. Check the vendor advisory for mitigations.

References

• https://github.com/rclone/rclone/security/advisories/GHSA-gj73-fh6v-92fj
• https://www.vulncheck.com/advisories/rclone-1.64.0-before-1.75.2-serve-webdav-authentication-bypass-via-options-requests
• https://github.com/rclone/rclone/security/advisories/GHSA-gj73-fh6v-92fj

Get alerted when CVE-2026-116193 or the next vulnerability affects your stack