FasterXML jackson-databind 2.x before 2.9.9.1 might allow attackers to have a variety of impacts by leveraging failure to block the logback-

Summary

FasterXML jackson-databind 2.x before 2.9.9.1 might allow attackers to have a variety of impacts by leveraging failure to block the logback-core class from polymorphic deserialization. Depending on the classpath content, remote code execution may be possible.

Timeline

1. Jun 24, 2019, 3:34 PM 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 2.9.9.1

• 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 25