GHSA-j3rv-43j4-c7qm · 深刻度: high · エコシステム: maven — jackson-databind has a PolymorphicTypeValidator bypass via generic type parameters that allows arbitrary class instantiation
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
総合評価: CVE-2026-54512 は悪用リスクが高い(62.9/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.60%、44 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 2026-06-24 | — | 0.60% | — |
EPSS の全履歴 (全 1 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 |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
GHSA-j3rv-43j4-c7qm · 深刻度: high · エコシステム: maven — jackson-databind has a PolymorphicTypeValidator bypass via generic type parameters that allows arbitrary class instantiation
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-54512 not yet assigned priority: Debian including 1 source packages (jackson-databind), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. | https://security-tracker.debian.org/tracker/CVE-2026-54512 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-54512/ |
ubuntu
|
medium | CVE-2026-54512 medium priority: Ubuntu including 1 source packages (jackson-databind), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream): needs-triage 8. | https://ubuntu.com/security/CVE-2026-54512 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| fasterxml | jackson-databind | >= 2.10.0, < 2.18.8 | cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* |
| fasterxml | jackson-databind | >= 2.19.0, < 2.21.4 | cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* |
| fasterxml | jackson-databind | >= 3.0.0, < 3.1.4 | cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5 | Patch |
| https://github.com/FasterXML/jackson-databind/issues/5988 | Issue Tracking Patch |
| https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm | Exploit Vendor Advisory |