# CVE-2026-79783: rclone: rclone before 1.74.4 fails to mask special permission bits when applying source-supplied mode metadata in the local b...

CVE-2026-79783 is fixed in 3 products on 1 platform, first by ALAS2023-2026-3129, released September 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-79783
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 28, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rclone amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |
| Linux | rclone-debuginfo amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |
| Linux | rclone-debugsource amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |

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Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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