CVE-2026-55183 RClone Manager: Unauthenticated RClone Daemon Enables Remote Attack via Malicious Web Page
An unauthenticated local API allows malicious web pages to access storage credentials and files via cross-origin requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-55183?
CVE-2026-55183 is a critical missing authorization vulnerability in Zarestia-Dev rclone-manager, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
RClone Manager is a cross-platform GUI application designed to help users manage Rclone remotes efficiently. Prior to 0.2.7, RClone Manager starts the local rclone rcd service on 127.0.0.1:51900 with --rc-no-auth, --rc-allow-origin *, and --rc-serve. A malicious web page opened by a user while the daemon is running can therefore send cross-origin requests to the unauthenticated local API with the user's operating-system privileges. The requests can disclose configured storage credentials and potentially access, upload, modify, or exfiltrate locally stored files accessible to the user and files available through configured remotes; the advisory's possible command-execution impact remains unconfirmed. This issue is fixed in version 0.2.7.
Weakness: CWE-306
Which versions are affected by CVE-2026-55183?
How do I fix CVE-2026-55183?
No fix has been published for CVE-2026-55183 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55183 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55183 exists.
Sources
Also known as GHSA-f3qj-7hx5-q4c8.