{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "3.0.0"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.31.0"
              },
              {
                "introduced": "0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "5ab2bed8749747b8e4b2ed431fd102bc726be684"
            },
            {
              "fixed": "a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb"
            },
            {
              "introduced": "a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb"
            },
            {
              "fixed": "aa8650b300aa4cabd85d9c72b431301509b9043f"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "aa8650b300aa4cabd85d9c72b431301509b9043f"
            }
          ],
          "repo": "https://github.com/freerdp/freerdp",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2vf2-grvj-6g8x"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91964.json"
  },
  "details": "FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.",
  "id": "CVE-2026-91964",
  "modified": "2026-09-18T03:30:32.054770215Z",
  "published": "2026-09-15T15:18:17.388Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91964.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2vf2-grvj-6g8x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91964"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/freerdp-2.0.0-through-3.30.0-heap-buffer-overflow-via-routingtoken"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FreeRDP 2.0.0 through 3.30.0 Heap Buffer Overflow via RoutingToken"
}