FKIE_CVE-2026-68497
Vulnerability from fkie_nvd - Published: 2026-09-11 16:17 - Updated: 2026-09-11 17:17
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "com.fasterxml.jackson.core:jackson-databind",
"product": "jackson-databind",
"programFiles": [
"src/main/java/com/fasterxml/jackson/databind/ext/CoreXMLDeserializers.java"
],
"programRoutines": [
{
"name": "com.fasterxml.jackson.databind.ext.CoreXMLDeserializers.Std._deserialize"
}
],
"repo": "https://github.com/FasterXML/jackson-databind",
"vendor": "FasterXML",
"versions": [
{
"lessThan": "2.18.10",
"status": "affected",
"version": "2.0.0",
"versionType": "maven"
},
{
"lessThan": "2.21.6",
"status": "affected",
"version": "2.19.0",
"versionType": "maven"
},
{
"lessThan": "2.22.2",
"status": "affected",
"version": "2.22.0",
"versionType": "maven"
}
]
},
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "tools.jackson.core:jackson-databind",
"product": "jackson-databind",
"programFiles": [
"src/main/java/tools/jackson/databind/ext/CoreXMLDeserializers.java"
],
"programRoutines": [
{
"name": "tools.jackson.databind.ext.CoreXMLDeserializers.Std._deserialize"
}
],
"repo": "https://github.com/FasterXML/jackson-databind",
"vendor": "FasterXML",
"versions": [
{
"lessThan": "3.1.6",
"status": "affected",
"version": "3.0.0",
"versionType": "maven"
},
{
"lessThan": "3.2.2",
"status": "affected",
"version": "3.2.0",
"versionType": "maven"
}
]
}
],
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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\u0027s StreamReadConstraints.maxNumberLength guard never applies; jackson\u0027s 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\u0027s 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."
}
],
"id": "CVE-2026-68497",
"lastModified": "2026-09-11T17:17:46.393",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-68497",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-11T16:26:23.881034Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-09-11T16:17:39.610",
"references": [
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"url": "https://github.com/FasterXML/jackson-databind/commit/a99b7e74c8928f43f6975773a8c862c8316178bd"
},
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"url": "https://github.com/FasterXML/jackson-databind/pull/6127"
},
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"url": "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-q4xh-88c3-wmh7"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"url": "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-q4xh-88c3-wmh7"
}
],
"sourceIdentifier": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-400"
},
{
"lang": "en",
"value": "CWE-1333"
}
],
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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