Low severity · published Aug 25, 2026
CVE-2026-79783
rclone before 1.74.4 Privilege Escalation via setuid Metadata
3.6
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Local
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RC
rclone · rclone
before 1.74.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79783
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79783
github.com
https://github.com/rclone/rclone/security/advisories/GHSA-945v-v9p3-v5xw
www.vulncheck.com
https://www.vulncheck.com/advisories/rclone-before-privilege-escalation-via-setuid-metadata
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