Denial of Service in danny-avila/librechat

{
  "id": "5112b5e3e92a26cb581ea5963345bcae07f23989b321fa5b95c96b3bd1347fed",
  "url": "https://osv.dev/vulnerability/CVE-2025-8849",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Denial of Service in danny-avila/librechat",
    "summary": "LibreChat version 0.7.9 is vulnerable to a Denial of Service (DoS) attack due to unbounded parameter values in the `/api/memories` endpoint. The `key` and `value` parameters accept arbitrarily large inputs without proper validation, leading to a null pointer error in the Rust-based backend when excessively large values are submitted. This results in the inability to create new memories, impacting the stability of the service.",
    "evidence": "osv:CVE-2025-8849",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-8849",
      "aliases": [
        "CVE-2025-8849"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/LibreChat-AI/LibreChat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "007570b5c61e0049c177a7bec44196d310a21b4b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "v0.8.0-rc2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "SplitRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "edf33bedcbb08c33e59df76f06454ed7efd896f9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.7.9-NA",
            "v0.8.0-rc1",
            "v0.7.9",
            "librechat-1.8.9",
            "v0.7.9-rc1",
            "v0.7.8",
            "v0.7.8-rc1",
            "v0.7.7",
            "v0.7.7-rc1",
            "v0.7.6",
            "v0.7.6-rc1",
            "v0.7.5",
            "v0.7.5-rc2",
            "v0.7.5-rc1",
            "v0.7.4",
            "v0.7.4-rc1",
            "v0.7.3",
            "v0.7.3-rc2",
            "v0.7.3-rc",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.10",
            "v0.6.9",
            "v0.6.6",
            "v0.6.5",
            "v0.6.1",
            "v0.6.0",
            "v0.5.9",
            "v0.5.8",
            "v0.5.7",
            "v0.5.6",
            "v0.5.5",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.8",
            "v0.4.7",
            "v0.4.6",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.3",
            "v0.3.0",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "v0.0.6",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-8849.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.487007352Z",
      "provider": "osv",
      "references": [
        "https://huntr.com/bounties/e9d9404c-cd19-4226-a580-9cba14b7d7d6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8849.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-8849",
        "https://github.com/danny-avila/librechat/commit/edf33bedcbb08c33e59df76f06454ed7efd896f9"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400"
        ],
        "cna_assigner": "@huntr_ai",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8849.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-8849",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520271,
  "published_at": "2025-10-30T23:42:41.552+00:00"
}