What is CVE-2026-79783?

CVE-2026-79783 is a low-severity vulnerability in Rclone, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 3.6/10. Published 2026-08-25.

How severe is CVE-2026-79783?

Low severity. CVSS v3 base score is 3.6 out of 10.

Vulnerability in Rclone

CVE-2026-79783

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.

CVSS v3 metric

CVSS v3 base score 3.6 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Rclone

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-79783?: CVE-2026-79783 is a low-severity vulnerability in Rclone, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 3.6/10. Published 2026-08-25.
How severe is CVE-2026-79783?: Low severity. CVSS v3 base score is 3.6 out of 10.