{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "6.0.28"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "68794c8e2e67d5f38da59e379dc051b2789e46f6"
            },
            {
              "fixed": "17557e888134c0a250bff43b035a52b751a39db7"
            }
          ],
          "repo": "https://github.com/libp2p/js-libp2p",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x3m2-6mg8-vj7f"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-248",
      "CWE-755"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103936.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "3.3.7"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "libp2p is a JavaScript implementation of the libp2p networking stack. Prior to 6.0.28, the @libp2p/webrtc webRTCDirect() Node.js listener processes unauthenticated STUN Binding Requests before PeerId authentication, Noise, muxing, protocol negotiation, connection creation, or connection-manager admission. The listener in packages/transport-webrtc/src/private-to-public/utils/stun-listener.ts forwards the packet-controlled request.ufrag into DirectRTCPeerConnection.setLocalDescription, where the value is reused as an ICE password without validating its required length and character set. A short credential causes node-datachannel or libdatachannel to raise an uncaught native invalid_argument and abort the process with SIGABRT, allowing a single remote UDP packet to deny service. The confirmed impact is process termination only, with no demonstrated memory corruption, code execution, browser impact, confidentiality impact, integrity impact, or connection-limit bypass. This issue is fixed in version 6.0.28.",
  "id": "CVE-2026-103936",
  "modified": "2026-10-17T02:30:41.437200814Z",
  "published": "2026-10-15T17:28:32.567Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103936.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103936"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libp2p/js-libp2p/pull/3584"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` WebRTC-direct Node.js listeners"
}