OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender (CVE-2026-103397) | HOL Guard CVE

Medium · CVSS 6.3CVE-2026-103397

OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender

Answer in brief

CVE-2026-103397 records a Medium severity (CVSS 6.3) vulnerability in OpenSave before 2.4.0-beta.1 Authentication Bypass via Spoofed Relay Sender. The current sources do not mark it as known exploited. The current feed maps Liquid-co/OpenSave (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Liquid-co/OpenSave (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Liquid-co/OpenSavegeneric	>=0 <2.4.0-beta.1	2.4.0-beta.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for Liquid-co/OpenSave.
Review the reported fix. Update Liquid-co/OpenSave to 2.4.0-beta.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.