{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0.8.2-rc2"
              },
              {
                "fixed": "0.8.3-rc1"
              }
            ]
          },
          "events": [
            {
              "introduced": "24e8a258cd8fa1ff42c02cf15408079f1dbe07b0"
            },
            {
              "fixed": "9eeec6bc4f5e856ac65f50784254d484b2808622"
            }
          ],
          "repo": "https://github.com/danny-avila/librechat",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f92m-jpv7-55p2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31945.json"
  },
  "details": "LibreChat is a ChatGPT clone with additional features. Versions 0.8.2-rc2 through 0.8.2 are vulnerable to a server-side request forgery (SSRF) attack when using agent actions or MCP. Although a previous SSRF vulnerability (https://github.com/danny-avila/LibreChat/security/advisories/GHSA-rgjq-4q58-m3q8) was reported and patched, the fix only introduced hostname validation. It does not verify whether DNS resolution results in a private IP address. As a result, an attacker can still bypass the protection and gain access to internal resources, such as an internal RAG API or cloud instance metadata endpoints. Version 0.8.3-rc1 contains a patch.",
  "id": "CVE-2026-31945",
  "modified": "2026-04-01T23:08:50.774717357Z",
  "published": "2026-03-27T19:23:53.395Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31945.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-f92m-jpv7-55p2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31945"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LibreChat Server-Side Request Forgery using DNS resolution"
}