CVE-2019-14910: A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS

This week

CRITICAL 9.8REMOTEWATCHLISTDOWNGRADE

CVE-2019-14910 is a critical-severity flaw (CVSS 9.8) affecting keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS is used instead of SSL/TLS from the LDAP server (ldaps), in this case user authentication succeeds even if invalid password has entered.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-287, CWE-305, CWE-592, CWE-295
Published	2019-12-05
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

2019-12-05 15:15 UTCPublished CVE record published
2026-06-17 02:19 UTCUpdated Record last modified

redhat keycloak DOWNGRADE

Affected: 7.0.0 · 7.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison keycloak sudo apt install keycloak=<VERSION_BEFORE_7.0.0> sudo apt-mark hold keycloak

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list keycloak sudo dnf downgrade keycloak-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add keycloak

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2019-14910?

keycloak: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-14910 being exploited?

CVE-2019-14910 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-2019-14910 affect?

CVE-2019-14910 affects keycloak. Severity is critical (CVSS 9.8). A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS is used instead of SSL/TLS from the LDAP server (ldaps), in this case user authentication succeeds even if invalid password has en

How urgent is CVE-2019-14910?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Keycloak vulnerabilities

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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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