Apache MINA: Critical Deserialization Allow-list Bypass via resolveProxyClass - ZDRES-232

{
  "id": "7e678ff046169d0ea76dbd373f9ef23f6cd9504dd97938e3560dbd9d34cf46a6",
  "url": "https://osv.dev/vulnerability/CVE-2026-47065",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache MINA: Critical Deserialization Allow-list Bypass via resolveProxyClass - ZDRES-232",
    "summary": "ZDRES-232: resolveProxyClass Not Overridden - acceptMatchers Filter Bypass via java.lang.reflect.Proxy Assessment: Fully addressed. When the serialised stream contains a TC_PROXYCLASSDESC (the marker for a java.lang.reflect.Proxy ), JDK’s ObjectInputStream.readProxyDesc() is dispatched. JDK then calls the default ObjectInputStream.resolveProxyClass(interfaces) implementation, which performs Class.forName(intf, false, latestUserDefinedLoader()) for EACH interface name and constructs the proxy class — bypassing the accepted classes list . ZDRES-233: Class.forName(name, initialize=true, classLoader) in readClassDescriptor Triggers Static Initialiser of Allow-Listed Classes Assessment: Fully addressed. For ANY class on the allow-list, deserialising a stream that names it triggers the class’s (static initialiser) BEFORE any instance is constructed. This means an attacker who supplies a class name on the allow-list (e.g., the developer wrote accept(“com.myapp.*\") , attacker supplies com.myapp.SomeClass ) causes of SomeClass — and many real-world classes have side-effecting static initialisers Both issues have been fixed.",
    "evidence": "osv:CVE-2026-47065",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-47065",
      "aliases": [
        "CVE-2026-47065",
        "GHSA-v3pr-hxpr-mfm8"
      ],
      "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/apache/mina",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0b8a0e5002a03b8b732a45edef02059648d8f8e4"
                },
                {
                  "last_affected": "4e0e0aeea8580328a2794b1157a9acc642da15fb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:mina:2.0.29:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.29"
                      },
                      {
                        "last_affected": "2.0.29"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:mina:2.1.13:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.1.13"
                      },
                      {
                        "last_affected": "2.1.13"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:mina:2.2.8:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2.8"
                      },
                      {
                        "last_affected": "2.2.8"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.29",
            "2.1.13",
            "2.2.8"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47065.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.098923517Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2/org/apache/mina",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47065.json",
        "https://lists.apache.org/thread/y7xj1bl8qo47p9bktb11hg5v6k1d4dyj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47065"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-502"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.2.0"
                  },
                  {
                    "fixed": "2.2.8"
                  },
                  {
                    "introduced": "2.1.0"
                  },
                  {
                    "fixed": "2.1.13"
                  },
                  {
                    "introduced": "2.0.0"
                  },
                  {
                    "fixed": "2.0.29"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47065.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47065",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504457,
  "published_at": "2026-06-03T09:39:41.629+00:00"
}