GHSA-4v8g-86x5-3vrc · 深刻度： critical · エコシステム： maven — Apache OpenNLP DictionaryEntryPersistor Vulnerable to XML External Entity (XXE) via Unsanitized Dictionary Parsing
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 Dictionary(InputStream) constructor with input validation that rejects any XML containing a DOCTYPE declaration before it reaches the parser.
総合評価: CVE-2026-40682 は中リスク（47.8/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 0.40%、32 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.09% | 0.40% | +0.32% |
| 2 | 2026-05-07 | 0.03% | 0.09% | +0.06% |
| 3 | 2026-05-05 | — | 0.03% | — |
EPSS の全履歴 （全 3 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-4v8g-86x5-3vrc · 深刻度： critical · エコシステム： maven — Apache OpenNLP DictionaryEntryPersistor Vulnerable to XML External Entity (XXE) via Unsanitized Dictionary Parsing
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-40682 not yet assigned priority: Debian including 1 source packages (apache-opennlp), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-40682 |
ubuntu
|
medium | CVE-2026-40682 medium priority: Ubuntu including 1 source packages (apache-opennlp), 6 status rows across 6 suites (focal, jammy, noble, questing, resolute, upstream): needs-triage 6. | https://ubuntu.com/security/CVE-2026-40682 |
| URL | タグ |
|---|---|
| https://lists.apache.org/thread/r6jpt0qr9nj67gqhppqg7jxf8vsbo0w6 | Mailing List Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/05/01/19 | Mailing List Third Party Advisory |