Vulnerability · Published Aug 25, 2026 · Assigned by VulnCheck

CVE-2026-79778rclone before v1.75.0 Denial of Service via TUS nil-response panic

Medium 5.3

In plain English

A medium-severity security flaw in rclone from rclone. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 78.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	rclone	no fix listed	DEBIAN-CVE-2026-79778
Debian:13	rclone	no fix listed	DEBIAN-CVE-2026-79778
Go	github.com/rclone/rclone	1.75.0	GHSA-3x6r-wxxg-53vv
Go	github.com/rclone/rclone	1.75.0	GO-2026-6183
Ubuntu:26.10	rclone	no fix listed	UBUNTU-CVE-2026-79778

Affected products (as reported)

Vendor	Product	Versions
rclone	rclone	0 – before 1.75.0

Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-3x6r-wxxg-53vv) vendor-advisory
VulnCheck Advisory: rclone before v1.75.0 Denial of Service via TUS nil-response panic third-party-advisory