CVE-2026-104480
Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership
- Published
- Last modified
- Status
- published
- Known exploitation
- Not listed in CISA KEV
- Fix
- Fixed in 1.2.0
- Public exploit
- None on Exploit-DB
CISA SSVC
- Exploitation: none
- Automatable: no
- Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).
SSVC documentationSummary
Discord libdave before 1.2.0 did not reject an MLS Welcome message when the resulting group roster contained an unrecognized participant. An attacker in control of the DAVE signaling path (the voice gateway, or an equivalent position able to add, alter, or withhold signaling messages to a client) could cause affected clients to accept an unauthorized member into the end-to-end encrypted media session, compromising the confidentiality and integrity of audio and video.
Affected versions
- discord/libdave
From 1.1.0 · fixed in 1.2.0; From 7b15f1fc16f159da0478aa6be909e38f1e957833 · fixed in 9686fbaea864aa19f0675e486672b6a77811b6a1