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CVE-2026-68497— jackson-databind: unbounded numeric parse in Duration and XMLGregorianCalendar deserialization allows CPU denial of service

Quick assessment

Affected
FasterXML jackson-databind
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FasterXML jackson-databind是FasterXML组织开源的一个具有数据绑定功能的组件。 FasterXML jackson-databind 2.0.0版本至2.18.10之前版本、2.19.0版本至2.21.6之前版本、2.22.0版本至2.22.2之前版本、3.0.0版本至3.1.6之前版本和3.2.0版本至3.2.2之前版本存在资源管理错误漏洞，该漏洞源于CoreXMLDeserializers.Std._deserialize方法将原始JSON字符串直接传递给Datatyp

CVSS 7.5 · High EPSS 0.63% · P50

Affected Version Matrix 5

VendorProduct Version RangeStatus
FasterXML jackson-databind 2.0.0< 2.18.10 affected
2.19.0< 2.21.6 affected
2.22.0< 2.22.2 affected
3.0.0< 3.1.6 affected
3.2.0< 3.2.2 affected
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I. Basic Information for CVE-2026-68497

Vulnerability Information
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Vulnerability Title
jackson-databind: unbounded numeric parse in Duration and XMLGregorianCalendar deserialization allows CPU denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
FasterXML jackson-databind 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FasterXML jackson-databind是FasterXML组织开源的一个具有数据绑定功能的组件。 FasterXML jackson-databind 2.0.0版本至2.18.10之前版本、2.19.0版本至2.21.6之前版本、2.22.0版本至2.22.2之前版本、3.0.0版本至3.1.6之前版本和3.2.0版本至3.2.2之前版本存在资源管理错误漏洞，该漏洞源于CoreXMLDeserializers.Std._deserialize方法将原始JSON字符串直接传递给Datatyp
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FasterXML jackson-databind 2.0.0 ~ 2.18.10 -
FasterXML jackson-databind 3.0.0 ~ 3.1.6 -

II. Public POCs for CVE-2026-68497

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III. Intelligence Information for CVE-2026-68497

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Patches & Fixes for CVE-2026-68497 (2)

Vendor Advisories for CVE-2026-68497 (1)

IV. Related Vulnerabilities

Same product: jackson-databind
Same vendor: FasterXML
Same weakness: CWE-400