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.

Published 2026-08-25 · last modified 2026-09-10.

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.

EPSS exploit prediction

EPSS: 0.002 (12.4th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

Rclone

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

github.com/rclone/rclone/security/advisories/GHSA-945v-v9p3-v5xw (vendor-advisory)
www.vulncheck.com/advisories/rclone-before-privilege-escalation-via-setuid-meta… (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.