Vulnerability in Rclone
CVE-2026-79778
rclone before v1.75.0 contains a denial of service vulnerability in the WebDAV TUS creation handler that dereferences a nil response before checking for transport errors. A malicious or compromised configured endpoint can reset connections during TUS uploads to trigger a panic that terminates unrecovered goroutines and halts unrelated work in long-lived processes.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/rclone/rclone/security/advisories/GHSA-3x6r-wxxg-53vv (vendor-advisory)
- www.vulncheck.com/advisories/rclone-before-denial-of-service-via-tus-nil-respon… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-79778?
- CVE-2026-79778 is a medium-severity vulnerability in Rclone, classified under CWE-248. CVSS score: 5.3/10. Published 2026-08-25.
- How severe is CVE-2026-79778?
- Medium severity. CVSS v3 base score is 5.3 out of 10.