Vulnerability in Liquid-Co Opensave
CVE-2026-103397
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gist.github.com/mansurmavlankulov/2ca66f95965fb9d4aab353bcf2434cdb (third-party-advisory)
- github.com/Liquid-co/OpenSave/commit/2f2612b13233ac123e01a03cb3008c44bacaeae3 (patch)
- github.com/Liquid-co/OpenSave/blob/v2.3.1/internal/p2p/wanclient_handlers.go (technical-description)
- github.com/Liquid-co/OpenSave (product)
- www.vulncheck.com/advisories/opensave-before-2.4.0-beta.1-authentication-bypass… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103397?
- CVE-2026-103397 is a medium-severity vulnerability in Liquid-Co Opensave, classified under Authentication Bypass by Spoofing. CVSS score: 5.6/10. Published 2026-09-30.
- How severe is CVE-2026-103397?
- Medium severity. CVSS v3 base score is 5.6 out of 10.