{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.3.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d828185efcac9abc2e46e6da1c171393500fa319"
            },
            {
              "fixed": "92e23bf7d40473b9116abd5cb9278f860ded0479"
            }
          ],
          "repo": "https://github.com/ether/etherpad",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f7h5-v9hm-548j"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55085.json"
  },
  "details": "Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in src/node/utils/ImportEtherpad.ts accepts attacker-controlled attribute-pool values from a crafted .etherpad import, including list:number1 and a malicious start value. Any user with write access to a pad can store markup that executes as cross-site scripting when another user opens the pad or /timeslider, including when an administrator views the pad. This issue is fixed in version 3.3.1.",
  "id": "CVE-2026-55085",
  "modified": "2026-08-23T03:42:45.745883872Z",
  "published": "2026-08-19T19:34:27.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ether/etherpad/releases/tag/v3.3.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55085.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ether/etherpad/security/advisories/GHSA-f7h5-v9hm-548j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55085"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ether/etherpad/commit/d828185efcac9abc2e46e6da1c171393500fa319"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ether/etherpad/pull/7937"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Etherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-lite"
}