> CVE-2026-54512 [HIGH]

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PUBLISHED
2026-06-23 21:17
MODIFIED
2026-06-23 21:17
CVSS_SCORE V3
8.1
EPSS (Prob. Exploit)
0.94%
Top 38.9%
DATA SOURCES:
NVD đź”— 2026-06-23 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
2.2
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-184 CWE-502

> CWE DETAILED DESCRIPTIONS

CWE-184: Incomplete List of Disallowed Inputs - The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete. | CWE-502: Deserialization of Untrusted Data - The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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> GITHUB SECURITY ADVISORY

GHSA-j3rv-43j4-c7qm HIGH

jackson-databind has a PolymorphicTypeValidator bypass via generic type parameters that allows arbitrary class instantiation

AFFECTED PACKAGES:
MAVEN / tools.jackson.core:jackson-databind
>= 3.0.0, <= 3.1.3
Fixed in: 3.1.4
MAVEN / com.fasterxml.jackson.core:jackson-databind
>= 2.19.0, <= 2.21.3
Fixed in: 2.21.4
MAVEN / com.fasterxml.jackson.core:jackson-databind
>= 3.0.0, <= 3.1.3
Fixed in: 3.1.4
MAVEN / com.fasterxml.jackson.core:jackson-databind
>= 2.10.0, <= 2.18.7
Fixed in: 2.18.8

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

jackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation

AFFECTED PACKAGES:
Unknown / Unknown
44 versions affected
ALIASES:
GHSA-j3rv-43j4-c7qm

> HISTORIQUE DES MODIFICATIONS

Première apparition
23/06/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-184: Incomplete List of Disallowed Inputs - The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise requ...
Total des modifications: 1 Dernière mise à jour: 4 months ago

> REFERENCES

https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aa...
https://github.com/FasterXML/jackson-databind/issues/5988
https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4...
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