Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfig

{
  "id": "e19da1dced2e11df8c3e80437b0e704429d7f0b07398c6255296ffdc9fb42d03",
  "url": "https://osv.dev/vulnerability/CVE-2026-105294",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfig",
    "summary": "Legcord 1.1.0 through 1.3.0 contains a configuration injection vulnerability that allows script in the Discord page to write any config key via the window.legcord settings.setConfig bridge. Attackers exploiting a Discord XSS can set additionalArguments to persistently add --proxy-server and --ignore-certificate-errors switches, routing all client traffic through an interception proxy.",
    "evidence": "osv:CVE-2026-105294",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-105294",
      "aliases": [
        "CVE-2026-105294"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/legcord/legcord",
              "type": "GIT",
              "events": [
                {
                  "introduced": "07451f0d7e110cf6d31d0e32abedcefcff256d78"
                },
                {
                  "last_affected": "c8d91f61296019bb0c45f375535de8c93cf26ee1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.1.0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.1.0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.0",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.5",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105294.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.956735374Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105294.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105294",
        "https://www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-chromium-switch-injection-via-settings-setconfig",
        "https://github.com/Legcord/Legcord/issues/1163",
        "https://github.com/Legcord/Legcord",
        "https://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L296-L299",
        "https://github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts#L277-L307"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-15"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105294.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105294",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521700,
  "published_at": "2026-10-05T00:44:19.284+00:00"
}