ChatGPTNextWeb NextChat Proxy Fallback proxy.ts proxyHandler server-side request forgery

{
  "id": "961308ade62a9283a0ab5d468a851354af37c936403204fc90b168131f80d6e6",
  "url": "https://osv.dev/vulnerability/CVE-2026-105238",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ChatGPTNextWeb NextChat Proxy Fallback proxy.ts proxyHandler server-side request forgery",
    "summary": "A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This vulnerability affects the function proxyHandler of the file app/api/proxy.ts of the component Proxy Fallback Handler. This manipulation of the argument x-base-url causes server-side request forgery. It is possible to initiate the attack remotely. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.",
    "evidence": "osv:CVE-2026-105238",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-105238",
      "aliases": [
        "CVE-2026-105238"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/chatgptnextweb/nextchat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "377480b448798488db5ef03f4d5c44d2d930693c"
                },
                {
                  "last_affected": "557a2cce357749c6fb3176d42e03ff6f7de4d355"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.16.0"
                      },
                      {
                        "last_affected": "2.16.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.16.1"
                      },
                      {
                        "last_affected": "2.16.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.16.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.16.0",
            "2.16.1",
            "v2.16.1",
            "v2.16.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105238.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.180150665Z",
      "provider": "osv",
      "references": [
        "https://github.com/ChatGPTNextWeb/NextChat/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105238.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105238",
        "https://vuldb.com/cve/CVE-2026-105238",
        "https://vuldb.com/submit/975707",
        "https://vuldb.com/vuln/413450",
        "https://github.com/ChatGPTNextWeb/NextChat/issues/6813",
        "https://vuldb.com/vuln/413450/cti",
        "https://github.com/ChatGPTNextWeb/NextChat/pull/6884"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105238.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105238",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490499,
  "published_at": "2026-10-05T06:15:11.244+00:00"
}