CVE-2026-104480Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership
Updated under an hour ago ()
Does this affect you?
It affects Discord libdave. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.40%, higher than 32% of scored CVEs.
Do this next
Free account, 1 product
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.
- CVSS
- 9.4 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
- Weakness (CWE)
- CWE-390, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.40% (percentile 32)
- Assigned by
- Bugcrowd
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Discord libdave discord:libdave (from the name) | from 1.1.0 before 1.2.0; from 7b15f1fc16f159da0478aa6be909e38f1e957833 before 9686fbaea864aa19f0675e486672b6a77811b6a1 | CNA record |
References
- https://github.com/discord/libdave/commit/9686fbaea864aa19f0675e486672b6a77811b6a1patch
- https://github.com/discord/libdave/releases/tag/v1.2.0/cpprelease-notes
- https://daveprotocol.com/technical-description
- https://github.com/discord/libdaveproduct
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.