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    2 vulnerabilities found for libdave by Discord

    CVE-2026-104480 (GCVE-0-2026-104480)

    Vulnerability from nvd – Published: 2026-10-02 00:57 – Updated: 2026-10-02 00:57
    VLAI
    Title
    Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership
    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.
    Severity
    9.4 (Critical)
    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
    CWE
    • CWE-390 - Detection of Error Condition Without Action
    • CWE-863 - Incorrect Authorization
    Assigner
    References
    Impacted products
    Vendor Product Version
    Discord libdave Affected: 1.1.0 , < 1.2.0 (semver)
    Affected: 7b15f1fc16f159da0478aa6be909e38f1e957833 , < 9686fbaea864aa19f0675e486672b6a77811b6a1 (git)
    		Create a notification for this product.
    Credits
    MDL (https://heartbreak.ing)
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "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"
            },
            {
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              "versionType": "git"
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          ]
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      ],
      "credits": [
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          "type": "finder",
          "value": "MDL (https://heartbreak.ing)"
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      ],
      "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": [
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          "cvssV4_0": {
            "baseScore": 9.4,
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      "problemTypes": [
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          "descriptions": [
            {
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              "description": "CWE-390 Detection of Error Condition Without Action",
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          ]
        },
        {
          "descriptions": [
            {
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              "description": "CWE-863 Incorrect Authorization",
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              "type": "CWE"
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      "providerMetadata": {
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        "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": [
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          "url": "https://daveprotocol.com/"
        },
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          "tags": [
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          "url": "https://github.com/discord/libdave"
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      "title": "Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership",
      "x_generator": {
        "engine": "cvelib 1.8.0"
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  "cveMetadata": {
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    "assignerShortName": "Bugcrowd",
    "cveId": "CVE-2026-104480",
    "datePublished": "2026-10-02T00:57:55.648Z",
    "dateReserved": "2026-10-02T00:57:11.860Z",
    "dateUpdated": "2026-10-02T00:57:55.648Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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    CVE-2026-104480 (GCVE-0-2026-104480)

    Vulnerability from cvelistv5 – Published: 2026-10-02 00:57 – Updated: 2026-10-02 00:57
    VLAI
    Title
    Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership
    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.
    Severity
    9.4 (Critical)
    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
    CWE
    • CWE-390 - Detection of Error Condition Without Action
    • CWE-863 - Incorrect Authorization
    Assigner
    References
    Impacted products
    Vendor Product Version
    Discord libdave Affected: 1.1.0 , < 1.2.0 (semver)
    Affected: 7b15f1fc16f159da0478aa6be909e38f1e957833 , < 9686fbaea864aa19f0675e486672b6a77811b6a1 (git)
    		Create a notification for this product.
    Credits
    MDL (https://heartbreak.ing)
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "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",
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              "version": "7b15f1fc16f159da0478aa6be909e38f1e957833",
              "versionType": "git"
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          ]
        }
      ],
      "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",
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          "descriptions": [
            {
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              "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"
            }
          ]
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      ],
      "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/"
        },
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          "tags": [
            "product"
          ],
          "url": "https://github.com/discord/libdave"
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      "title": "Improper MLS Welcome roster validation in Discord libdave allows unauthorized group membership",
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