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CVE-2026-103397— OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender

Quick assessment

Affected
Liquid-co OpenSave
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSave 在 2.4.0-beta.1 之前的版本未能对 WAN（广域网）中继请求中的发送者身份进行有效验证，导致未配对的房间成员可以通过伪造 RelayMessage 的 From 字段来冒充已配对设备。攻击者若知晓房间代码，即可加入该房间，从公告中读取已配对的对端标识符，并发送伪造请求以访问受保护的同步路由，包括保存数据、快照及文件操作。

CVSS 5.6 · Medium

Possible ATT&CK Techniques 1 AI

T1566 · Phishing

Affected Version Matrix 1

VendorProduct Version RangeStatus
Liquid-co OpenSave < 2.4.0-beta.1 affected
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I. Basic Information for CVE-2026-103397

Vulnerability Information
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Vulnerability Title
OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Liquid-co OpenSave 0 ~ 2.4.0-beta.1 -

II. Public POCs for CVE-2026-103397

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103397

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Vendor Advisories for CVE-2026-103397 (1)

Proof of Concept for CVE-2026-103397 (1)

Other References for CVE-2026-103397 (2)

Other References for CVE-2026-103397 (1)

IV. Related Vulnerabilities

Same product: OpenSave
Same vendor: Liquid-co
Same weakness: CWE-290

V. Comments for CVE-2026-103397

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