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 cook

Q: How do I fix CVE-2019-3868?

keycloak: upgrade to newer than 6.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2019-3868 being exploited?

CVE-2019-3868 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-3868 affect?

CVE-2019-3868 affects keycloak. Severity is low (CVSS 3.8). 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 sess

Q: How urgent is CVE-2019-3868?

Priority 34/100. On your watchlist

Routine

LOW 3.8WATCHLISTUPGRADE

CVE-2019-3868 is a low-severity flaw (CVSS 3.8) affecting keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	3.8 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-200
Published	2019-04-24
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-04-24 16:29 UTCPublished CVE record published
2026-06-17 02:35 UTCUpdated Record last modified

redhat keycloak UPGRADE

Affected: <= 6.0.0

Fixed in: newer than 6.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy keycloak || rpm -q keycloak || keycloak --version

2. UPGRADE to newer than 6.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keycloak

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keycloak

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-3868?

keycloak: upgrade to newer than 6.0.0. Exact commands for each OS are on this page.

Is CVE-2019-3868 being exploited?

CVE-2019-3868 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-3868 affect?

CVE-2019-3868 affects keycloak. Severity is low (CVSS 3.8). 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 sess

How urgent is CVE-2019-3868?

Priority 34/100. On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2023-6927 MEDIUM 4.6 MITIGATE DOWNGRADE A flaw was found in Keycloak
CVE-2023-6563 HIGH 7.7 UPGRADE DOWNGRADE An unconstrained memory consumption vulnerability was discovered in Keycloak
CVE-2023-6291 HIGH 7.1 UPGRADE DOWNGRADE A flaw was found in the redirect_uri validation logic in Keycloak
CVE-2023-6134 MEDIUM 4.6 UPGRADE UPGRADE A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is app
CVE-2025-8419 MEDIUM 5.3 MITIGATE A vulnerability was found in Keycloak-services

References

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