CVE-2026-104480: Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership
Critical · CVSS 9.4 (CVSS 4.0)EPSS 0.40%, 34th percentilePublished Updated Assigner: Bugcrowd
Description
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.
CWE-390, CWE-863
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Discord: libdave
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- daveprotocol.com (opens in new tab)
- github.com/discord/libdave (opens in new tab)
- github.com/discord/libdave/commit/9686fbaea864aa19f0675e486672b6a77811b6a1 (opens in new tab)
- github.com/discord/libdave/releases/tag/v1.2.0/cpp (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)