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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rclone | rclone | 1.64.0 – < 1.75.2 | 1.75.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rclone | No fix yet | — |
| Ubuntu 18.04 LTS | rclone | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | rclone | No fix yet | — |
| Ubuntu Pro 24.04 LTS | rclone | No fix yet | — |
| Ubuntu Pro 22.04 LTS | rclone | No fix yet | — |
| Ubuntu Pro 20.04 LTS | rclone | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | rclone | 1.75.2-r0 | — |
Advisories 1
- WID-SEC-2026-4156 rclone: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
References
- GitHub Security Advisory (GHSA-gj73-fh6v-92fj) vendor-advisory
- VulnCheck Advisory: Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests third-party-advisory