{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2024.11.0-alpha.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a21a2c52d7c3cf75cf67e001e664cb083188e2b8"
            }
          ],
          "repo": "https://github.com/misskey-dev/misskey",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2024.11.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "551040ed0ff4bfabeb4c54df2fd1860d58bedd21"
            }
          ],
          "repo": "https://github.com/syuilo/misskey",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m2gq-69fp-6hv4"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/52xxx/CVE-2024-52591.json"
  },
  "details": "Misskey is an open source, federated social media platform. In affected versions missing validation in `ApRequestService.signedGet` and `HttpRequestService.getActivityJson` allows an attacker to create fake user profiles and forged notes. The spoofed users will appear to be from a different instance than the one where they actually exist, and the forged notes will appear to be posted by a different user. Vulnerable Misskey instances will accept the spoofed objects as valid, allowing an attacker to impersonate other users and instances. The attacker retains full control of the spoofed user / note and can interact like a real account. This issue has been addressed in version 2024.11.0-alpha.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.",
  "id": "CVE-2024-52591",
  "modified": "2026-03-10T21:50:15.744480627Z",
  "published": "2024-12-18T19:20:31.238Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/52xxx/CVE-2024-52591.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-m2gq-69fp-6hv4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-52591"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:N/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Missing validation allows spoofed profiles and notes in Misskey"
}