Description
rclone before 1.74.4 fails to mask special permission bits when applying source-supplied mode metadata in the local backend, allowing attackers to set setuid/setgid bits on attacker-controlled files. When copying with metadata preservation from an untrusted remote, attackers can plant a setuid binary that escalates privileges to root if rclone runs as root, or to the service account user otherwise.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rclone | rclone | < 1.74.4 | 1.74.4 |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | rclone | No fix yet | — |
| Debian 12 | rclone | No fix yet | — |
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 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | rclone | 1.75.1-1.amzn2023 | ALAS2023-2026-3129 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/rclone/rclone | < 1.74.4 | 1.74.4 | GHSA-945v-v9p3-v5xw |
Advisories 2
- ALAS2023-2026-3129 Important: rclone security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 28, 2026
- WID-SEC-2026-2266 rclone: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 25, 2026
References
- GitHub Security Advisory (GHSA-945v-v9p3-v5xw) vendor-advisory
- VulnCheck Advisory: rclone before 1.74.4 Privilege Escalation via setuid Metadata third-party-advisory