{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.4.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0d58adb69d859fc94c43b9d68fadd77e810d5ed1"
            },
            {
              "fixed": "917b23a6c16d93fc00cef67900eff2755e8b13f7"
            }
          ],
          "repo": "https://github.com/makeplane/plane",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-hh2r-3hwp-mvq3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104979.json"
  },
  "details": "Plane is an open-source project management tool. Prior to 1.4.0, IntakeIssuePublicViewSet.create in Plane v1.3.1 writes description_html through Issue.objects.create(...) without calling validate_html_content from nh3. Any authenticated user, including a new user with no workspace memberships, can plant arbitrary HTML in a project that has a published DeployBoard with intake enabled. When a project member or viewer of a closed intake item clicks the planted link, the TipTap \\tjavascript: parser bypass and the target=\"_self\" click handler execute JavaScript in the viewer's session and exfiltrate a long-lived API token. This issue is fixed in 1.4.0.",
  "id": "CVE-2026-104979",
  "modified": "2026-10-07T02:31:11.276885329Z",
  "published": "2026-10-05T17:49:53.030Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/makeplane/plane/releases/tag/v1.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104979.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104979"
    },
    {
      "type": "FIX",
      "url": "https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/makeplane/plane/pull/9287"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Plane: Cross-tenant stored XSS in intake enables account takeover"
}