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CVE-2020-25649

jackson-databind: FasterXML DOMDeserializer insecure entity expansion is vulnerable to XML external entity (XXE)

A flaw was found in FasterXML Jackson Databind, where it did not have entity expansion secured properly. This flaw allows vulnerability to XML external entity (XXE) attacks. The highest threat from this vulnerability is data integrity.

CVSS 3.1 · 7.5 High EPSS 17.7% KEV · Not listed
Vendors
Apache Fasterxml Fedoraproject and 4 more
Products
Iotdb Jackson-databind Fedora and 47 more
CVE-2020-11619

jackson-databind: Serialization gadgets in org.springframework:spring-aop

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.springframework.aop.config.MethodLocatingFactoryBean (aka spring-aop).

CVSS 3.1 · 8.1 High EPSS 3.7% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Active Iq Unified Manager and 28 more
CVE-2020-9547

jackson-databind: Serialization gadgets in ibatis-sqlmap

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig (aka ibatis-sqlmap).

CVSS 3.1 · 9.8 Critical EPSS 18.4% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Active Iq Unified Manager and 25 more
CVE-2020-9546

jackson-databind: Serialization gadgets in shaded-hikari-config

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.hadoop.shaded.com.zaxxer.hikari.HikariConfig (aka shaded hikari-config).

CVSS 3.1 · 9.8 Critical EPSS 4.6% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Active Iq Unified Manager and 39 more
CVE-2019-16943

jackson-databind: Serialization gadgets in com.p6spy.engine.spy.P6DataSource

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the p6spy (3.8.6) jar in the classpath, and an attacker can find an RMI service endpoint to access, it is possible to make the service execute a malicious payload. This issue exists because of com.p6spy.engine.spy.P6DataSource mishandling.

CVSS 3.1 · 9.8 Critical EPSS 4.7% KEV · Not listed
Vendors
Debian Fasterxml Fedoraproject and 3 more
Products
Debian Linux Jackson-databind Fedora and 33 more
CVE-2022-42004

jackson-databind: use of deeply nested arrays

In FasterXML jackson-databind before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. An application is vulnerable only with certain customized choices for deserialization.

CVSS 3.1 · 7.5 High EPSS 3.4% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Oncommand Workflow Automation and 17 more
CVE-2022-42003

jackson-databind: deep wrapper array nesting wrt UNWRAP_SINGLE_VALUE_ARRAYS

In FasterXML jackson-databind before versions 2.13.4.1 and 2.12.17.1, resource exhaustion can occur because of a lack of a check in primitive value deserializers to avoid deep wrapper array nesting, when the UNWRAP_SINGLE_VALUE_ARRAYS feature is enabled.

CVSS 3.1 · 7.5 High EPSS 3.4% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Oncommand Workflow Automation and 20 more
CVE-2026-91777

jackson-databind: quadratic forward-reference completion in Collection and Map deserializers

Forward-reference completion for @JsonIdentityInfo object IDs in FasterXML jackson-databind performs a linear scan of the pending-reference accumulator for every resolved ID. The affected paths are CollectionDeserializer.CollectionReferringAccumulator.resolveForwardReference() and the equivalent implementation in MapDeserializer. When a document first creates N unresolved object-ID references in an identity-enabled collection or map and then defines those same IDs in reverse order, completion performs on the order of N * (N + 1) / 2 identity comparisons, so a shallow document whose size grows linearly causes quadratic CPU work during deserialization. The reporter instrumented equals() calls on the ID class and measured exactly 2,003,000 comparisons at N = 2,000, against zero comparisons in the pending-reference lookup path for an equally sized control in which every reference was already resolved. The input requires no deep nesting and no syntactically unusual JSON. Exploitation requires an application that deserializes attacker-influenced JSON into an identity-enabled collection or map. The fix replaces the repeated linear lookup with a keyed pending-reference structure.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-91776

jackson-databind: unbounded growth of the type id cache in TypeDeserializerBase retains every unknown raw type ID

TypeDeserializerBase._findDeserializer() in FasterXML jackson-databind caches the resolved deserializer under the raw, attacker-supplied type ID. When name-based polymorphism is configured with a fallback, for example @JsonTypeInfo(use = Id.NAME, defaultImpl = ...), every distinct unrecognized type ID resolves to the same fallback deserializer but is retained as its own key in the _deserializers map. That map has no configurable bound and lives for the lifetime of the type deserializer, so an attacker who can repeatedly supply fresh unknown type IDs causes monotonic memory retention across requests. The reporter observed 10,000 retained entries from 10,000 distinct unknown IDs, against a single entry for a control that repeated one unknown ID the same number of times, isolating attacker-controlled key cardinality from request volume. Exploitation requires an application that enables name-based polymorphism with a defaultImpl or equivalent fallback, accepts attacker-influenced type IDs, and reuses a long-lived ObjectMapper across requests. The fix stops caching fallback resolutions for unrecognized IDs and bounds both the number of cached entries and the length of a cacheable type ID.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-68497

jackson-databind: unbounded numeric parse in Duration and XMLGregorianCalendar deserialization allows CPU denial of service

jackson-databind binds a JSON string to a javax.xml.datatype.Duration or javax.xml.datatype.XMLGregorianCalendar field by passing the raw string verbatim to DatatypeFactory.newDuration(value) or newXMLGregorianCalendar(value) in CoreXMLDeserializers.Std._deserialize. These deserializers are registered by default with no opt-in, so a plain ObjectMapper or JsonMapper with no polymorphic typing and no special configuration reaches this path. The XML Schema lexical grammar permits numeric components of arbitrary length, which the JDK materializes through the native BigInteger(String) and BigDecimal(String) constructors, both quadratic in digit count. Because the digits sit inside a JSON string token rather than a JSON number token, jackson-core's StreamReadConstraints.maxNumberLength guard never applies; jackson's own NumberDeserializers call validateIntegerLength or validateFPLength before parsing a stringified number, but the XML datatype deserializer omits that pre-check. An unauthenticated attacker can therefore submit a single request of a few megabytes, such as a Duration value consisting of the letter P followed by several million digits and the letter Y, and force tens of seconds to several minutes of single-threaded CPU work; a handful of concurrent requests can saturate a server's worker threads. This affects com.fasterxml.jackson.core:jackson-databind from 2.0.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-54513

jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)

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, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

CVSS 3.1 · 8.1 High EPSS 1.2% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-83557

jackson-databind omits java.lang.Comparable from DefaultBaseTypeLimitingValidator's unsafe base types

DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically whenever @JsonTypeInfo is used without an explicitly configured custom validator. It denies polymorphic resolution only for a fixed set of "unsafe base types", and its isSafeSubType method returns true unconditionally for every base type outside that set. java.lang.Comparable was absent from the list despite being implemented by a very large fraction of JDK and application classes, comparable in breadth to java.io.Serializable, which is on the list for that reason. An application declaring an @JsonTypeInfo-annotated property or class with Comparable as its base type, and no custom PolymorphicTypeValidator, will accept a type identifier for essentially any class implementing Comparable. This yields an attacker-controlled object instantiation primitive; a demonstrated case constructs a java.io.File for an arbitrary attacker-chosen path, which becomes path-traversal-adjacent if the application subsequently calls path-sensitive methods on the value. No class implementing Comparable has been identified that yields code execution through deserialization alone. Global Default Typing via activateDefaultTyping is not affected, because that method structurally requires an explicit PolymorphicTypeValidator argument. This affects com.fasterxml.jackson.core:jackson-databind from 2.11.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2.

CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-19032

jackson-databind resolves attacker-controlled URI schemes when deserializing java.nio.file.Path

jackson-databind's deserializer for java.nio.file.Path resolves an attacker-supplied URI without restricting the URI scheme. In JDKFromStringDeserializer.NioPathHelper.deserialize, a string bound from untrusted JSON is passed to new URI(value) and then to Path.of(uri). When that throws FileSystemNotFoundException, the code enumerates ServiceLoader<FileSystemProvider> and calls provider.getPath(uri) on the first provider whose scheme matches the attacker-chosen scheme. Untrusted JSON can therefore select and drive an arbitrary registered FileSystemProvider during readValue under a default JsonMapper, and forces provider class loading at the same time. With only the JDK built-in providers (file, jar/zipfs) present, the resolved path is inert and no mount or network I/O occurs; further impact requires a side-effecting third-party FileSystemProvider on the classpath. This affects com.fasterxml.jackson.core:jackson-databind from 2.8.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2. Binding java.nio.file.Path from untrusted JSON should be avoided regardless of version.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2026-77310

jackson-databind: Eager DNS resolution (SSRF) still present in InetAddress deserialization (Incomplete fix for CVE-2026-54514)

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. Prior to versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1 on their respective release lines, the java.net.InetAddress branch of FromStringDeserializer.Std._deserialize() calls InetAddress.getByName() on attacker-controlled input, causing eager DNS resolution during deserialization and enabling DNS-based server-side request forgery and internal-host enumeration. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Fasterxml
Products
Jackson-databind
CVE-2020-10968

jackson-databind: Serialization gadgets in org.aoju.bus.proxy.provider.*.RmiProvider

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.aoju.bus.proxy.provider.remoting.RmiProvider (aka bus-proxy).

CVSS 3.1 · 8.8 High EPSS 3.7% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Steelstore Cloud Integrated Storage and 39 more
CVE-2020-10673

jackson-databind: mishandles the interaction between serialization gadgets and typing which could result in remote command execution

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.caucho.config.types.ResourceRef (aka caucho-quercus).

CVSS 3.1 · 8.8 High EPSS 8.0% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Steelstore Cloud Integrated Storage and 39 more
CVE-2020-10672

jackson-databind: mishandles the interaction between serialization gadgets and typing which could result in remote command execution

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.aries.transaction.jms.internal.XaPooledConnectionFactory (aka aries.transaction.jms).

CVSS 3.1 · 8.8 High EPSS 3.1% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Steelstore Cloud Integrated Storage and 38 more