CVE-2026-79781

EUVD-2026-65539
rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in the serve root directory.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 21.05%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
rclonerclone
𝑥
< 1.74.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
rclone
bookworm
postponed
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
rclone
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
rclone
Amazon Linux 2023
0:1.75.1-1.amzn2023
fixed
rclone-debuginfo
Amazon Linux 2023
0:1.75.1-1.amzn2023
fixed
rclone-debugsource
Amazon Linux 2023
0:1.75.1-1.amzn2023
fixed
Common Weakness Enumeration
References
https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v
https://www.vulncheck.com/advisories/rclone-serve-s3-path-traversal-via-dot-dot-object-keys
https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v