{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8266fbbe6af93fa370018886c7f1f35d2cee8b3f"
            }
          ],
          "repo": "https://github.com/deskflow/deskflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gmvh-3c73-m5gg"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63409.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "1.17.0"
          },
          {
            "fixed": "1.26.0.296"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.296, a malicious Deskflow server can send an odd-length DSOP vector to ServerProxy::setOptions() in src/lib/client/ServerProxy.cpp, causing the missing value after the final option key to be read beyond the vector during the PacketStreamFilter::filterEvent to ServerProxy::handleData() to ServerProxy::parseHandshakeMessage() call chain and crash the connected client. This issue is fixed in continuous build 1.26.0.296.",
  "id": "CVE-2026-63409",
  "modified": "2026-08-20T03:30:22.919512482Z",
  "published": "2026-08-17T20:57:19.326Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63409.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63409"
    },
    {
      "type": "FIX",
      "url": "https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client"
}