A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9.

Summary

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has JDOM 1.x or 2.x jar in the classpath, an attacker can send a specifically crafted JSON message that allows them to read arbitrary local files on the server.

Timeline

1. Jun 19, 2019, 1:24 PM UTCCVE published
2. Aug 27, 2025, 8:29 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Aug 27, 2025, 8:30 PM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

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

Affected versions

• n/a n/a

  Version range not reported

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

  From 2.9.0 · fixed in 2.9.9.1

• 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

  From 2.0.0 · fixed in 2.6.7.3

References 26