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CVE record · CVE-2026-104480

Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership

CVSS 9.4 CriticalCriticalEPSS 0.0040 · 34th percentile

Critical, because:

  • CVSS score 9.4: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: Bugcrowd) at 2 Oct 2026, 00:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Discord libdave Package name: discord/libdave https://github.com
  • affected 1.1.0 to before 1.2.0 semver
  • affected 7b15f1fc16f159da0478aa6be909e38f1e957833 to before 9686fbaea864aa19f0675e486672b6a77811b6a1 git
Other versions: unaffected
Identifiers
CVE-2026-104480
CNA
Bugcrowd
Weakness (CWE)
CWE-390 · CWE-863
Tags
Published
2 Oct 2026
Updated
2 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.4 Critical 4.0 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 CNA (Bugcrowd)
  • CISA KEV Not listed.
  • EPSS 0.0040, the 34th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 2 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.