ProjectSend 2.0.0 through 2.7.1 Incorrect Authorization via File Version Linking

{
  "id": "ab29e2fa254745298eba563cce49c64f51f50c149ebba7a3ffdbfb9e98b4d43d",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116136",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ProjectSend 2.0.0 through 2.7.1 Incorrect Authorization via File Version Linking",
    "summary": "ProjectSend 2.0.0 through 2.7.1 contains an incomplete authorization vulnerability in FileVersions::link() that allows staff users to share files without authorization by linking file versions. Attackers can link their file onto an intermediate revision or assign out-of-scope clients, causing moveAssignmentsToRoot() to expose protected original files to unauthorized clients.",
    "evidence": "cve:CVE-2026-116136",
    "products": [
      {
        "name": {
          "value": "ProjectSend",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-116136",
      "aliases": [
        "CVE-2026-116136"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 6,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 5.9,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N",
            "integrityImpact": "LOW",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "vendor": "projectsend",
          "product": "ProjectSend",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "2.7.1"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-25T11:51:01.317Z",
      "provider": "cve",
      "references": [
        "https://github.com/projectsend/projectsend/commit/a6ce4f51cfd05e1c9895f8daed261ef1fdfd194d",
        "https://github.com/projectsend/projectsend",
        "https://github.com/projectsend/projectsend/blob/v2.7.1/app/Modules/Files/Versions/FileVersions.php#L456-L467",
        "https://github.com/projectsend/projectsend/blob/v2.7.1/app/Modules/Files/Versions/FileVersions.php#L534-L575",
        "https://www.vulncheck.com/advisories/projectsend-2.0.0-through-2.7.1-incorrect-authorization-via-file-version-linking"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-25T11:51:01.317Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116136",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 136268,
  "published_at": "2026-10-25T11:51:01.317+00:00"
}