{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.8.4"
              },
              {
                "fixed": "1.8.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "37506b4d40da1e49d64fcdcfe981d861d14df620"
            }
          ],
          "repo": "https://github.com/benjaminjonard/koillection",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110101.json"
  },
  "details": "Koillection through 1.8.4 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML files as Datum file attachments lacking MIME restrictions. Attackers can upload HTML payloads via POST /api/data/{id}/file, served as text/html from public/uploads, executing JavaScript in victims' sessions to perform actions on their behalf.",
  "id": "CVE-2026-110101",
  "modified": "2026-10-15T02:30:36.041811631Z",
  "published": "2026-10-13T16:53:05.007Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110101.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/benjaminjonard/koillection/releases/tag/1.8.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110101"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-attachment-uploads"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/benjaminjonard/koillection/issues/1609"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/benjaminjonard/koillection"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-L50"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Koillection through 1.8.4 Stored XSS via Datum File Attachment Uploads"
}