CVE-2026-104480 (GCVE-0-2026-104480)
Vulnerability from cvelistv5
Published
2026-10-02 00:57
Modified
2026-10-02 18:18
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-104480",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-02T18:18:39.777597Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-02T18:18:52.157Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com",
"defaultStatus": "unaffected",
"modules": [
"C++ library"
],
"packageName": "discord/libdave",
"product": "libdave",
"programFiles": [
"cpp/src/mls/session.cpp"
],
"programRoutines": [
{
"name": "discord::dave::mls::Session::VerifyWelcomeState"
}
],
"repo": "https://github.com/discord/libdave",
"vendor": "Discord",
"versions": [
{
"lessThan": "1.2.0",
"status": "affected",
"version": "1.1.0",
"versionType": "semver"
},
{
"lessThan": "9686fbaea864aa19f0675e486672b6a77811b6a1",
"status": "affected",
"version": "7b15f1fc16f159da0478aa6be909e38f1e957833",
"versionType": "git"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "MDL (https://heartbreak.ing)"
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"vectorString": "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",
"version": "4.0"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-390",
"description": "CWE-390 Detection of Error Condition Without Action",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863 Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-02T00:57:55.648Z",
"orgId": "4ac701fe-44e9-4bcd-9585-dd6449257611",
"shortName": "Bugcrowd"
},
"references": [
{
"name": "[cpp] restore strict validation of MLS welcome state",
"tags": [
"patch"
],
"url": "https://github.com/discord/libdave/commit/9686fbaea864aa19f0675e486672b6a77811b6a1"
},
{
"name": "libdave v1.2.0 release notes",
"tags": [
"release-notes"
],
"url": "https://github.com/discord/libdave/releases/tag/v1.2.0/cpp"
},
{
"name": "Discord Audio and Video End-to-End Encryption (DAVE) Protocol Whitepaper",
"tags": [
"technical-description"
],
"url": "https://daveprotocol.com/"
},
{
"tags": [
"product"
],
"url": "https://github.com/discord/libdave"
}
],
"title": "Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "4ac701fe-44e9-4bcd-9585-dd6449257611",
"assignerShortName": "Bugcrowd",
"cveId": "CVE-2026-104480",
"datePublished": "2026-10-02T00:57:55.648Z",
"dateReserved": "2026-10-02T00:57:11.860Z",
"dateUpdated": "2026-10-02T18:18:52.157Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-104480\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-02T18:18:39.777597Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-02T18:18:46.174Z\"}}], \"cna\": {\"title\": \"Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"MDL (https://heartbreak.ing)\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 9.4, \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"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\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/discord/libdave\", \"vendor\": \"Discord\", \"modules\": [\"C++ library\"], \"product\": \"libdave\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.1.0\", \"lessThan\": \"1.2.0\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"7b15f1fc16f159da0478aa6be909e38f1e957833\", \"lessThan\": \"9686fbaea864aa19f0675e486672b6a77811b6a1\", \"versionType\": \"git\"}], \"packageName\": \"discord/libdave\", \"programFiles\": [\"cpp/src/mls/session.cpp\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"discord::dave::mls::Session::VerifyWelcomeState\"}]}], \"references\": [{\"url\": \"https://github.com/discord/libdave/commit/9686fbaea864aa19f0675e486672b6a77811b6a1\", \"name\": \"[cpp] restore strict validation of MLS welcome state\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/discord/libdave/releases/tag/v1.2.0/cpp\", \"name\": \"libdave v1.2.0 release notes\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://daveprotocol.com/\", \"name\": \"Discord Audio and Video End-to-End Encryption (DAVE) Protocol Whitepaper\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/discord/libdave\", \"tags\": [\"product\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-390\", \"description\": \"CWE-390 Detection of Error Condition Without Action\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"4ac701fe-44e9-4bcd-9585-dd6449257611\", \"shortName\": \"Bugcrowd\", \"dateUpdated\": \"2026-10-02T00:57:55.648Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-104480\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-02T18:18:52.157Z\", \"dateReserved\": \"2026-10-02T00:57:11.860Z\", \"assignerOrgId\": \"4ac701fe-44e9-4bcd-9585-dd6449257611\", \"datePublished\": \"2026-10-02T00:57:55.648Z\", \"assignerShortName\": \"Bugcrowd\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…