{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.84.0"
              },
              {
                "fixed": "1.7.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "8ab0c6ff484f02b5d97e130b20376a17dd4546cc"
            },
            {
              "fixed": "568b4ac074c67c5c58c75637c3a60b41f5bb1e6b"
            }
          ],
          "repo": "https://github.com/outline/outline",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rqrg-f3qc-xvgh"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43887.json"
  },
  "details": "Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.",
  "id": "CVE-2026-43887",
  "modified": "2026-07-15T01:49:16.542755344Z",
  "published": "2026-05-11T21:05:42.302Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43887.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/outline/outline/security/advisories/GHSA-rqrg-f3qc-xvgh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43887"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Outline: Stored XSS via Comment Mentions"
}