Typemill has Reflected XSS via login error view template

{
  "id": "3f77e7ea65f140bd63ad7a7db22b5bac4345e7c6d86f77bb1ef132f9fc1e622f",
  "url": "https://osv.dev/vulnerability/CVE-2026-24127",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Typemill has Reflected XSS via login error view template",
    "summary": "Typemill is a flat-file, Markdown-based CMS designed for informational documentation websites. A reflected Cross-Site Scripting (XSS) exists in the login error view template `login.twig` of versions 2.19.1 and below. The `username` value can be echoed back without proper contextual encoding when authentication fails. An attacker can execute script in the login page context. This issue has been fixed in version 2.19.2.",
    "evidence": "osv:CVE-2026-24127",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-24127",
      "aliases": [
        "CVE-2026-24127",
        "GHSA-65x4-pjhj-r8wr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/typemill/typemill",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3c1682e61e76703841a2831bf8335d310558d323"
                },
                {
                  "fixed": "b506acd11e80fb9c8db5fa6c2c8ad73580b4e88c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:typemill:typemill:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.19.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b506acd11e80fb9c8db5fa6c2c8ad73580b4e88c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3c1682e61e76703841a2831bf8335d310558d323"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.19.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.19.1",
            "v2.19.0",
            "v2.18.4",
            "v2.18.3",
            "v2.18.2",
            "v2.18.1",
            "v2.18.0",
            "v2.17.4",
            "v2.17.1",
            "v2.17.3",
            "v2.17.2",
            "v2.17.0",
            "latest",
            "2.16.2",
            "2.16.1",
            "2.16.0",
            "2.15.0",
            "2.6.0",
            "1.1.6",
            "1.1.5",
            "1.1.4",
            "1.1.3",
            "1.1.2",
            "1.1.1.0",
            "1.1.1",
            "1.1.01",
            "1.1.0",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-24127.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.624933883Z",
      "provider": "osv",
      "references": [
        "https://github.com/typemill/typemill/releases/tag/v2.19.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24127.json",
        "https://github.com/typemill/typemill/security/advisories/GHSA-65x4-pjhj-r8wr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-24127",
        "https://github.com/typemill/typemill/commit/b506acd11e80fb9c8db5fa6c2c8ad73580b4e88c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-116",
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24127.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-24127",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509372,
  "published_at": "2026-01-23T23:01:15.832+00:00"
}