CVE-2026-68497 FasterXML CVE debrief

Who should care

Developers and administrators using jackson-databind in their applications should assess their exposure and take remediation steps. This includes reviewing the application's dependency tree, checking for usage of vulnerable jackson-databind versions, and implementing input validation and sanitization for JSON data. Security teams should monitor for suspicious traffic and system performance, and track exceptions and remediated assets.

Why it matters

CVE-2026-68497 is a high-severity vulnerability in jackson-databind that can be exploited for a denial-of-service (DoS) attack, potentially leading to performance degradation and saturation of server worker threads. Developers and administrators using jackson-databind should assess their exposure and take remediation steps.

• Denial-of-service (DoS) attack
• Excessive CPU work leading to performance degradation
• Potential for saturation of server worker threads

Technical summary

The jackson-databind library fails to properly validate the length of XML schema lexical grammar components, allowing an attacker to submit a malicious JSON string that can force the library to perform excessive CPU work. This occurs because the library 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.

Defensive priority

High

Recommended defensive actions

• Upgrade to jackson-databind version 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2
• Implement input validation and sanitization for JSON data
• Monitor for suspicious traffic and system performance
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is confirmed by the CVE Program and NVD. The affected versions of jackson-databind are 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. To verify exposure, defenders should review their application's dependency tree and check for usage of vulnerable jackson-databind versions.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.