Element allows a malicious homeserver can modify events leading to unrenderable events or rooms

{
  "id": "3dc9673d00ed89f46c2e16a55ef2291362544e13d7faf20bb47f600c24972f93",
  "url": "https://osv.dev/vulnerability/CVE-2024-51750",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Element allows a malicious homeserver can modify events leading to unrenderable events or rooms",
    "summary": "Element is a Matrix web client built using the Matrix React SDK. A malicious homeserver can send invalid messages over federation which can prevent Element Web and Desktop from rendering single messages or the entire room containing them. This was patched in Element Web and Desktop 1.11.85.",
    "evidence": "osv:CVE-2024-51750",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-51750",
      "aliases": [
        "CVE-2024-51750",
        "GHSA-w36j-v56h-q9pc"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/element-hq/element-web",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bbe474ae578d1f2152f57093d744321a24811279"
                },
                {
                  "fixed": "231073c578d5f92b33cde7aa2b0b9c5836b2dc48"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.85"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "231073c578d5f92b33cde7aa2b0b9c5836b2dc48"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.11.84",
            "v1.11.84-rc.0",
            "v1.11.83",
            "v1.11.82",
            "v1.11.82-rc.0",
            "v1.11.68",
            "v1.11.68-rc.0",
            "v1.11.35-no-media-devices-hotfix",
            "no-media-devices-release",
            "v1.9.5",
            "v1.9.5-rc.1",
            "v1.7.30",
            "v1.7.30-rc.1",
            "v1.7.23",
            "v1.7.23-rc.1",
            "v1.7.16",
            "v1.7.16-rc.1",
            "v1.7.14",
            "v1.7.14-rc.1",
            "v1.7.13",
            "v1.7.13-rc.1",
            "v1.7.11",
            "v1.7.11-rc.1",
            "v1.7.9",
            "v1.7.9-rc.1",
            "v1.7.2",
            "v1.7.1",
            "v1.7.0",
            "v1.5.10",
            "v1.5.3",
            "v1.4.2",
            "v1.4.2-rc.1",
            "v1.4.1",
            "v1.4.0",
            "v1.4.0-rc.2",
            "v1.4.0-rc.1",
            "v0.17.8",
            "v0.17.8-rc.1",
            "v0.16.3",
            "v0.16.3-rc.2",
            "v0.16.3-rc.1",
            "v0.16.0",
            "v0.16.0-rc.2",
            "v0.16.0-rc.1",
            "v0.15.5",
            "v0.15.5-rc.1",
            "v0.15.4",
            "v0.15.4-rc.1",
            "v0.15.1",
            "v0.15.0",
            "v0.15.0-rc.6",
            "v0.15.0-rc.5",
            "v0.15.0-rc.4",
            "v0.15.0-rc.3",
            "v0.15.0-rc.2",
            "v0.15.0-rc.1",
            "v0.14.3-rc.1",
            "v0.12.2",
            "v0.12.1",
            "v0.12.1-rc.1",
            "v0.12.0-rc.1",
            "v0.10.0",
            "v0.10.0-rc.2",
            "v0.9.3",
            "v0.9.2",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.5-r1",
            "v0.7.5",
            "v0.7.4-r1",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.1.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-51750.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.530501070Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/51xxx/CVE-2024-51750.json",
        "https://github.com/element-hq/element-web/security/advisories/GHSA-w36j-v56h-q9pc",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-51750",
        "https://github.com/element-hq/element-web/commit/231073c578d5f92b33cde7aa2b0b9c5836b2dc48"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-248"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/51xxx/CVE-2024-51750.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-51750",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488618,
  "published_at": "2024-11-12T16:34:27.928+00:00"
}