apache-opennlp — security advisory

{
  "id": "d5323981509bb7a5e59aa0cd2db93c9e897242222e870775916cb74e17aaf376",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-40682",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-40682",
    "summary": "XML External Entity (XXE) via Unsanitized Dictionary Parsing in Apache OpenNLP DictionaryEntryPersistor Versions Affected: before 2.5.9, before 3.0.0-M3 Description: The DictionaryEntryPersistor class initializes a static SAXParserFactory at class-load time without enabling FEATURE_SECURE_PROCESSING or disabling DTD processing. When create(InputStream, EntryInserter) is invoked, the only feature set on the XMLReader is namespace support — external entity resolution and DOCTYPE declarations remain fully enabled. An attacker who can supply a crafted dictionary file (e.g., a stop-word list or domain dictionary) containing a malicious DOCTYPE declaration can trigger local file disclosure via file:// entity references or server-side request forgery via http:// entity references during SAX parsing, before the application processes a single dictionary entry. This is inconsistent with the project's own XmlUtil.createSaxParser() helper, which correctly sets FEATURE_SECURE_PROCESSING and disallow-doctype-decl and is used by all other XML parsing paths in the codebase. The public Dictionary(InputStream) constructor delegates directly to this method and is the documented API for loading user-supplied dictionaries, making untrusted input a realistic scenario. Mitigation: 2.x users should upgrade to 2.5.9. 3.x users should upgrade to 3.0.0-M3. Users who cannot upgrade immediately should ensure that all dictionary files are sourced from trusted origins and should consider wrapping the Dicti",
    "evidence": "osv:DEBIAN-CVE-2026-40682",
    "products": [
      {
        "name": {
          "value": "apache-opennlp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.1.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.2.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.2.0-1~exp",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.3.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.3.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.3.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.3.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.3.3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.4.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.12-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.9-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "apache-opennlp",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.5.12-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.5.3-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.5.9-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "apache-opennlp",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.5.9-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "2.5.3-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2026-40682",
      "aliases": [
        "DEBIAN-CVE-2026-40682"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "apache-opennlp",
            "purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "2.1.0-1",
            "2.2.0-1",
            "2.2.0-1~exp",
            "2.3.0-1",
            "2.3.1-1",
            "2.3.1-2",
            "2.3.2-1",
            "2.3.3-1",
            "2.4.0-1",
            "2.5.0-1",
            "2.5.1-1",
            "2.5.12-1",
            "2.5.2-1",
            "2.5.3-1",
            "2.5.9-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40682.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "apache-opennlp",
            "purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "2.5.12-1",
            "2.5.3-1",
            "2.5.9-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40682.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.5.9-1"
                }
              ]
            }
          ],
          "package": {
            "name": "apache-opennlp",
            "purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "2.5.3-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40682.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T09:47:43.445216346Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-40682"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-40682"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-40682",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 461385,
  "published_at": "2026-05-04T17:16:23.657+00:00"
}