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HIGH severity

Unsafe Deserialization in jackson-databindGHSA-8w26-6f25-cm9x

HIGHFix: FasterXML/jackson-databind@567194c

GHSA-8w26-6f25-cm9x is a high-severity (CVSS 8.1) Deserialization of Untrusted Data vulnerability in com.fasterxml.jackson.core:jackson-databind. 1 public exploit reference exists, so weaponization risk is real. A fix is available for com.fasterxml.jackson.core:jackson-databind — see the affected versions and patch details below.

Also known asCVE-2020-36185
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
4.2%probability of exploitation in next 30 days
Lower Risk+0.05%
Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk
1.96%3.30%4.63%5.97%2.7%4.2%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-8w26-6f25-cm9x by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕com.fasterxml.jackson.core:jackson-databind

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.apache.tomcat.dbcp.dbcp2.datasources.SharedPoolDataSource.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.fasterxml.jackson.core:jackson-databind≥ 2.0.0&&< 2.9.10.82.9.10.8com.fasterxml.jackson.core:jackson-databind:2.9.10.8

Affected Products

45 products · 75 configurations
OS
debian linuxdebian
1 version
9.0
Application
jackson-databindfasterxml
≥ 2.7.0 && < 2.9.10.8
range
Application
cloud backupnetapp
all
Application
service level managernetapp
all
Application
agile product lifecycle managementoracle
1 version
9.3.6
Application
application testing suiteoracle
1 version
13.3.0.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interactio…

cowtowncoder.medium.comNVDJul 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.fasterxml.jackson.core:jackson-databind, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.fasterxml.jackson.core:jackson-databind to 2.9.10.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8w26-6f25-cm9x is resolved across your whole dependency graph.

  3. Workarounds

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

The following Red Hat products do ship the vulnerable component, but do not enable the unsafe conditions needed to exploit, lowering their vulnerability impact: * JBoss Data Grid 7 * Business Process Management Suite 6 * Business Rules Management Suite 6 * JBoss Data Virtualization 6 * Red Hat Fuse Service Works 6 *…

Workaround published by Red Hat
The following conditions are needed for an exploit, we recommend avoiding all if possible: * Deserialization from sources you do not control * `enableDefaultTyping()` * `@JsonTypeInfo using `id.CLASS` or `id.MINIMAL_CLASS` * avoid: oadd.org.apache.commons.dbcp.cpdsadapter.DriverAdapterCPDS, org.apache.commons.dbcp2.cpdsadapter.DriverAdapterCPDS, org.apache.tomcat.dbcp.dbcp.cpdsadapter.DriverAdapterCPDS, org.apache.tomcat.dbcp.dbcp2.cpdsadapter.DriverAdapterCPDS, org.docx4j.org.apache.xalan.lib.sql.JNDIConnectionPool, org.apache.tomcat.dbcp.dbcp2.datasources.PerUserPoolDataSource, org.apache.tomcat.dbcp.dbcp2.datasources.SharedPoolDataSource,…
Source: Red Hat security advisory for GHSA-8w26-6f25-cm9x (CC BY 4.0)
ProductFixed inAdvisory
OpenShift Logging 5.0openshift-logging/elasticsearch6-rhel8:v5.0.3-1RHSA-2021:1515
Red Hat OpenShift Container Platform 4.6openshift4/ose-logging-elasticsearch6:v4.6.0-202104161407.p0RHSA-2021:1230

Frequently Asked Questions

FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to `org.apache.tomcat.dbcp.dbcp2.datasources.SharedPoolDataSource`.
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Unsafe Deserialization in jackson-databind (High 8.1)