CVE-2026-79781CWE-22path-traversal

CVE-2026-79781

Medium · published August 25, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
21.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00302 · 21.8th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-08-25T20:17Z
References (3)
https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v · [email protected]https://www.vulncheck.com/advisories/rclone-serve-s3-path-traversal-via-dot-dot-object-keys · [email protected]https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 25 AUG 15:16Z
    rclone serve s3 Path Traversal via dot-dot object keys
    cvelistv5