CVE-2026-103397 OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender
Attackers can bypass authentication by spoofing relay sender identities to access protected sync routes, read data, and modify files in OpenSave.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103397?
CVE-2026-103397 is a medium-severity authentication bypass vulnerability in Liquid-co OpenSave, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenSave before 2.4.0-beta.1 fails to validate sender identity in WAN relay requests, allowing unpaired room members to impersonate paired devices by spoofing the RelayMessage From field. Attackers who know the room code can join, read paired peer identifiers from announcements, and send forged requests to access protected sync routes including save data, snapshots, and file operations.
Weakness: CWE-290
Which versions are affected by CVE-2026-103397?
How do I fix CVE-2026-103397?
No fix has been published for CVE-2026-103397 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-103397 being exploited?
There is no known exploitation of CVE-2026-103397 in the wild and no public exploit code.
Sources
Also known as GHSA-m7pc-whc6-fxc7.