CVE-2026-103397
OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender
- State
- Published
- Severity
- 6.3 Medium
- Published
- Sep 30, 2026
- Updated
- Oct 2, 2026
- Reserved
- Sep 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.6 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L | VulnCheck |
Weaknesses
- CWE-290 Authentication Bypass by Spoofing
Affected Products
| Product | Versions |
|---|---|
OpenSaveLiquid-co |
|
References
- https://gist.github.com/mansurmavlankulov/2ca66f95965fb9d4aab353bcf2434cdbthird-party-advisory
- Patch Commitpatch
- https://github.com/Liquid-co/OpenSave/blob/v2.3.1/internal/p2p/wanclient_handlers.go#L268-L282technical-description
- https://github.com/Liquid-co/OpenSaveproduct
- VulnCheck Advisory: OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Senderthird-party-advisory
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