Security advisory

{
  "id": "5f55a0bf08d9313addb585f28fa59067ba9eab60dc33a7ade142e5355d6a03f6",
  "url": "https://osv.dev/vulnerability/CVE-2019-11923",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-11923",
    "summary": "In Mcrouter prior to v0.41.0, the deprecated ASCII parser would allocate a buffer to a user-specified length with no maximum length enforced, allowing for resource exhaustion or denial of service.",
    "evidence": "osv:CVE-2019-11923",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-11923",
      "aliases": [
        "CVE-2019-11923"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/facebook/mcrouter",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9ffd13e9ab6c2c02bd1f95a7169c9a69b1b6bc54"
                },
                {
                  "fixed": "98ce6624cd2563cfdb5da3b2949d5e1e03867034"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:facebook:mcrouter:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.41.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "98ce6624cd2563cfdb5da3b2949d5e1e03867034"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9ffd13e9ab6c2c02bd1f95a7169c9a69b1b6bc54"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.41.0-release"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.39.0",
            "v0.38.0",
            "v0.37.0",
            "v0.36.0",
            "release-36-cve-fix",
            "v0.35.0",
            "v0.34.0",
            "v0.33.0",
            "v0.32.0",
            "v0.31.0",
            "v0.30.0",
            "v0.29.0",
            "v0.28.0",
            "v0.27.0",
            "v0.26.0",
            "v0.25.0",
            "v0.24.0",
            "v0.23.0",
            "v0.22.0",
            "v0.21.0",
            "v0.20.0",
            "v0.19.0",
            "v0.18.0",
            "v0.17.0",
            "v0.16.0",
            "v0.15.0",
            "v0.14.0",
            "v0.13.0",
            "v0.12.0",
            "v0.11.0",
            "v0.10.0",
            "v0.9.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-11923.json",
            "vanir_signatures": [
              {
                "id": "CVE-2019-11923-8c58217a",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "204285751708632397820198096865362966590",
                    "218963596161198465424678146777078642599",
                    "275199152256098293863193008935329626627"
                  ]
                },
                "source": "https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034",
                "target": {
                  "file": "mcrouter/lib/network/McAsciiParser.h"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:39:50Z"
          }
        }
      ],
      "modified": "2026-10-20T13:39:50.626714527Z",
      "provider": "osv",
      "references": [
        "https://github.com/facebook/mcrouter/releases/tag/v0.41.0-release",
        "https://www.facebook.com/security/advisories/cve-2019-11923",
        "https://github.com/facebook/mcrouter/commit/98ce6624cd2563cfdb5da3b2949d5e1e03867034"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-11923",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387923,
  "published_at": "2019-12-04T16:15:11.637+00:00"
}