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

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-25 · updated 2026-09-10
Weakness: CWE-248

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 products

rclone: before 1.75.0 — fixed in 1.75.0

How to fix

Upgrade to a fixed version: rclone 1.75.0. Check the vendor advisory for mitigations.

References

https://github.com/rclone/rclone/security/advisories/GHSA-3x6r-wxxg-53vv
https://www.vulncheck.com/advisories/rclone-before-denial-of-service-via-tus-nil-response-panic
https://github.com/rclone/rclone/security/advisories/GHSA-3x6r-wxxg-53vv

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