CVE-2026-116193

MEDIUM 5.3

Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-200
Vendor	rclone
Product	rclone
Published	Oct 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

rclone / rclone

1.64.0 < 1.75.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 sondt99 ncw