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Vulnerabilities

Vulnerability · CVE-2019-3868

Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC.

Published Apr 24, 2019 · catalog updated Jun 17, 2026 · Keycloak up to version

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2019-3868. EPSS is 1.00%. Act only if a listed version of Keycloak up to version is installed.

Gaps on this record

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

Same product and reporting

Severity
Low3.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.00%
Remediation
Version ranges on file
Affected products
cpe redhat/keycloak

Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user’s browser session.

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 redhat/keycloak<= 6.0.0

How to fix CVE-2019-3868

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-2019-3868. EPSS is 1.00%. Act only if a listed version of Keycloak up to version is installed.

Which versions are affected?

Compare what you have installed with <= 6.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-200: Exposure of Sensitive Information. EPSS 1.00%. 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.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 24, 2019 · Monitored products — high

    Detected

    Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user’s browser session.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user’s browser session.

Sources

  • CVE.orgVulnerability recordCVE-2019-3868

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2019-3868

    Keycloak up to version 6.0.0 allows the end user token (access or id token JWT) to be used as the session cookie for browser sessions for OIDC. As a result an attacker with access to service provider backend could hijack user’s browser session.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 3, 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