A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2.

Summary

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2. This occurs when Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the logback jar in the classpath.

Timeline

1. Jul 30, 2019, 10:49 AM UTCCVE published
2. Oct 8, 2026, 8:57 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Oct 8, 2026, 9:03 PM UTCRecord last updated
4. Oct 22, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• com.fasterxml.jackson.core:jackson-databindMaven

  From 2.9.0 · fixed in 2.9.9.2

• com.fasterxml.jackson.core:jackson-databindMaven

  From 2.8.0 · fixed in 2.8.11.4

• com.fasterxml.jackson.core:jackson-databindMaven

  From 2.7.0 · fixed in 2.7.9.6

• com.fasterxml.jackson.core:jackson-databindMaven

  fixed in 2.6.7.3

References 25