CVE-2026-79783rclone before 1.74.4 Privilege Escalation via setuid Metadata

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-945v-v9p3-v5xw) vendor-advisory
• VulnCheck Advisory: rclone before 1.74.4 Privilege Escalation via setuid Metadata third-party-advisory