CVE-2026-79783

low

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.

References

https://www.vulncheck.com/advisories/rclone-before-privilege-escalation-via-setuid-metadata

https://github.com/rclone/rclone/security/advisories/GHSA-945v-v9p3-v5xw

Details

Source: Mitre, NVD

Published: 2026-08-25

Updated: 2026-08-25

Risk Information

CVSS v2

Base Score: 2.6

Vector: CVSS2#AV:L/AC:H/Au:N/C:P/I:P/A:N

Severity: Low

CVSS v3

Base Score: 3.6

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Severity: Low

CVSS v4

Base Score: 2

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Severity: Low

EPSS

EPSS: 0.0014