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Vulnerabilities

Vulnerability · CVE-2020-1714

A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks.

Published May 13, 2020 · catalog updated Jun 17, 2026 · A flaw was found

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-1714. EPSS is 2.60%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.60%
Remediation
Version ranges on file
Affected products
cpe quarkus/quarkus · cpe redhat/decision manager · cpe redhat/jboss fuse · cpe redhat/keycloak · cpe redhat/process automation · cpe redhat/single sign-on

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe quarkus/quarkus<= 1.4.2
  • cpe redhat/decision manager7.0
  • cpe redhat/jboss fuse7.0.0
  • cpe redhat/keycloak< 11.0.0
  • cpe redhat/process automation7.0
  • cpe redhat/single sign-on7.0

How to fix CVE-2020-1714

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-1714. EPSS is 2.60%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Compare what you have installed with redhat/decision manager 7.0; redhat/jboss fuse 7.0.0; redhat/process automation 7.0; redhat/single sign-on 7.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 2.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Keycloak security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2020 · Monitored products — high

    Detected

    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.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2020-1714

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2020-1714

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026