NULL pointer dereference in rclone - #VU140650
Published: August 1, 2026
Vulnerability identifier: #VU140650
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to NULL pointer dereference in lib/http/middleware.go when handling plaintext requests with --client-ca enabled after TLS has been disabled by multiple --addr flags. A remote attacker can send a plaintext request to cause a denial of service.
The process survives because the HTTP server recovers per connection.
Affected software
rclone
Remediation
Install security update from vendor's website.
rclone - update to 1.75.0