What’s Vulnerable › Vulnerabilities

CVE-2020-1714

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-13 · updated 2026-06-17
• Weakness: CWE-20

Description

A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized in a privileged context and potentially lead to remote code execution.

Affected products

• quarkusio quarkus: through 1.4.2
• RedHat Decision Manager: 7.0
• RedHat Jboss Fuse: 7.0.0
• Keycloak: before 11.0.0 — fixed in 11.0.0
• RedHat Openshift Application Runtimes: all versions
• RedHat Process Automation: 7.0
• Red Hat Single Sign-On: 7.0

How to fix

Upgrade to a fixed version: Keycloak 11.0.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1714
• https://github.com/keycloak/keycloak/pull/7053
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1714
• https://github.com/keycloak/keycloak/pull/7053

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