FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read

{
  "id": "12a2e96959df35b03f664384bbedb33f5e23710ff4a12b14e343885fa6aeefd8",
  "url": "https://osv.dev/vulnerability/CVE-2026-49841",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read",
    "summary": "FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1.",
    "evidence": "osv:CVE-2026-49841",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-49841",
      "aliases": [
        "CVE-2026-49841",
        "GHSA-wfrq-qvg2-f88f"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/signalwire/freeswitch",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c2c59645f6911a76589e5008c4d73349ded44b65"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c2c59645f6911a76589e5008c4d73349ded44b65"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.11.1"
                  },
                  {
                    "cpe": "cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.11.0",
            "v1.10.12",
            "v1.10.11",
            "v1.10.10",
            "v1.10.9",
            "v1.10.8",
            "v1.10.7",
            "v1.10.6",
            "v1.10.5",
            "v1.10.4",
            "v1.10.3",
            "v1.10.2",
            "v1.10.1",
            "v1.10.0",
            "v1.6.0",
            "v1.5.final",
            "v1.5.14",
            "v1.5.13",
            "v1.5.12",
            "v1.5.10",
            "v.15.9",
            "v1.5.8",
            "v1.5.5",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.3.17-final",
            "v1.3.16",
            "v1.3.15",
            "v1.3.14",
            "v1.3.13",
            "v1.3.12",
            "v.1.3.12",
            "v0.0.1",
            "v1.3.11",
            "v1.3.10",
            "v1.3.9",
            "v1.3.8",
            "v1.3.7",
            "v1.3.6",
            "v1.3.5",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2-rc2",
            "v1.2-rc1",
            "git2svn-syncpoint-master"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49841.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.164649453Z",
      "provider": "osv",
      "references": [
        "https://github.com/signalwire/freeswitch/releases/tag/v1.11.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49841.json",
        "https://github.com/signalwire/freeswitch/security/advisories/GHSA-wfrq-qvg2-f88f",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-49841"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-122",
          "CWE-131"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49841.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-49841",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489626,
  "published_at": "2026-06-09T16:02:24.116+00:00"
}