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01 Record

CVE-2026-104480

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

CriticalPUBLISHEDCNA: Bugcrowd
CNA base score9.4 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
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02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.39% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 33.6% of scored records. A rank, not a probability.
NVD base score
9.4 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-02.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-02 00:57Z27 DAYS AGO
Last updated
2026-10-02 18:18Z26 DAYS AGO
Reserved
2026-10-02
Assigning CNA
Bugcrowd
Record state
PUBLISHED
Severity
Critical (CVSS 9.4)
CNA CVSS vector
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
Weaknesses
  • CWE-390Detection of Error Condition Without ActionBase
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
9049abe513accf5f7bfa9b06b8915833a6367943fc3aa871ed9df0f3442850a8

05 Affected products

VendorProductVersionsPlatforms
Discordlibdave1.1.0 to < 1.2.0, 7b15f1fc16f159da0478aa6be909e38f1e957833 to < 9686fbaea864aa19f0675e486672b6a77811b6a1—

06 References