xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation

{
  "id": "189bcd81a78707231185a352f7a4cadbc5e3b8aa3bad98fe3042e8498d87a026",
  "url": "https://osv.dev/vulnerability/CVE-2026-32624",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation",
    "summary": "xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.",
    "evidence": "osv:CVE-2026-32624",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-32624",
      "aliases": [
        "CVE-2026-32624",
        "GHSA-7q2g-6fjr-h6pp"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/neutrinolabs/xrdp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "440a538149561ec8e8e57552ab8f2e0e3f273cd5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.10.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "440a538149561ec8e8e57552ab8f2e0e3f273cd5"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.10.6"
                  },
                  {
                    "cpe": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.10.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.10.5",
            "v0.10.4.1",
            "v0.10.4",
            "v0.10.3",
            "v0.10.2",
            "v0.10.2-rc.1",
            "v0.10.1",
            "v0.10.0",
            "v0.10.0-beta.3",
            "v0.10.0-beta.2",
            "v0.10.0-beta.1",
            "v0.9.18",
            "v0.9.17",
            "v0.9.16",
            "v0.9.15",
            "v0.9.14",
            "v0.9.13",
            "v0.9.12",
            "v0.9.11",
            "v0.9.10",
            "v0.9.9",
            "v0.9.8",
            "v0.9.7",
            "v0.9.6",
            "v0.9.5",
            "v0.9.4",
            "v0.9.4.rc1",
            "v0.9.3",
            "v0.9.3.rc1",
            "v0.9.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32624.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.365058574Z",
      "provider": "osv",
      "references": [
        "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32624.json",
        "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-7q2g-6fjr-h6pp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32624"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-122"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32624.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-32624",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508063,
  "published_at": "2026-04-17T19:58:08.687+00:00"
}