Client accepts unsolicited RawPublicKey server certificate type

{
  "id": "544d56851a63ac1b548880245b4e18dcf853a7f755f9d458e916c33785839300",
  "url": "https://osv.dev/vulnerability/CVE-2026-89136",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Client accepts unsolicited RawPublicKey server certificate type",
    "summary": "When using RPK (Raw Public Key), the client side of a TLS 1.2, 1.3 and DTLS 1.2 connection could accept an unsolicited server_cert_type=RawPublicKey which allowed a malicious or misbehaving server to bypass authentication. RPK is off by default and only enabled in --enable-rpk OR --enable-all OR --enable-distro AKA HAVE_RPK builds.",
    "evidence": "osv:CVE-2026-89136",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-89136",
      "aliases": [
        "CVE-2026-89136"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wolfssl/wolfssl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "979707380c677dfa65e3ba48f19e149773a4a32d"
                },
                {
                  "last_affected": "ac01707f552c611fbd135cc723b2682b3e7f80f2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "5.6.0"
                      },
                      {
                        "last_affected": "5.9.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.9.2-stable",
            "v5.9.1-stable",
            "v5.9.0-stable",
            "v5.8.4-stable",
            "wolfEntropy2d",
            "v5.8.2-stable",
            "wolfEntropy1",
            "v5.8.0-stable",
            "v5.7.6-stable",
            "v5.7.4-stable",
            "v5.2.1",
            "v5.7.2-stable",
            "v5.7.0-stable",
            "v5.6.6-stable",
            "v5.6.4-stable",
            "v5.6.2-stable",
            "v5.6.3-stable",
            "v5.6.0-stable"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89136.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.026011367Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89136.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89136",
        "https://github.com/wolfSSL/wolfssl/pull/11009"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-287"
        ],
        "cna_assigner": "wolfSSL",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89136.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89136",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495771,
  "published_at": "2026-09-27T09:12:39.137+00:00"
}