{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b34ebf85a6445060bbe6770713717624cdd6c03d"
            }
          ],
          "repo": "https://github.com/langbot-app/langbot",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w8gq-g4pc-xh3h"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28509.json"
  },
  "details": "LangBot is a global IM bot platform designed for LLMs. Prior to version 4.8.7, LangBot’s web UI renders user-supplied raw HTML using rehypeRaw, which can lead to a cross-site scripting (XSS) vulnerability. This issue has been patched in version 4.8.7.",
  "id": "CVE-2026-28509",
  "modified": "2026-04-01T23:08:57.291242521Z",
  "published": "2026-03-06T04:16:58.761Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28509.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/langbot-app/LangBot/security/advisories/GHSA-w8gq-g4pc-xh3h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28509"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langbot-app/LangBot/commit/614621ab7b84fe50da3c6137705cde5a99429866"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LangBot has a Cross Site Scripting(XSS) Vulnerability"
}