Medium severity · published Oct 25, 2026
CVE-2026-116193
Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests
New
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
rclone · rclone
1.64.0 before 1.75.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116193
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116193
Vendor Advisory
https://github.com/rclone/rclone/security/advisories/GHSA-gj73-fh6v-92fj
Third Party Advisory
https://www.vulncheck.com/advisories/rclone-1.64.0-before-1.75.2-serve-webdav-authentication-bypass-via-options-requests
More from rclone
9.8
CVE-2026-88018
rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass
9.8
CVE-2026-49980
Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
9.8
CVE-2026-41179
RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution
9.8
CVE-2026-41176
Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
9.1
CVE-2026-88044
rclone: RC per-server auth-proxy bypass