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CVE-2018-10894

Keycloak Authentication Error

5.4 MediumFix available

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.35%Down 0.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 5.4

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
CVE-2018-10894
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-345
Updated
2026-11-02
EUVDEUVD-2022-5865 5.4

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
EUVD-2022-5865
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-xvv8-8wh9-9fh2 5.4

Keycloak Authentication Error

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
GHSA-xvv8-8wh9-9fh2
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-295
Updated
2026-11-02
NVD 5.4

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
CVE-2018-10894
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0
5.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:N
Weakness
CWE-345, CWE-295
Updated
2026-11-02
OSV 5.4

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
CVE-2018-10894
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-xvv8-8wh9-9fh2 5.4

Keycloak Authentication Error

It was found that SAML authentication in Keycloak 3.4.3.Final incorrectly authenticated expired certificates. A malicious user could use this to access unauthorized data or possibly conduct further attacks.

Record
GHSA-xvv8-8wh9-9fh2
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-295
Updated
2026-11-02
OSVRHSA-2018:3592 6.1

Red Hat Security Advisory: Red Hat Single Sign-On 7.2.5 on RHEL 6 security and bug fix update

Record
RHSA-2018:3592
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVRHSA-2018:3593 6.1

Red Hat Security Advisory: Red Hat Single Sign-On 7.2.5 on RHEL 7 security and bug fix update

Record
RHSA-2018:3593
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-saml-adapter-core
Maven
 before 4.4.0.Final
4.4.0.Final
org.keycloak:keycloak-services
Maven
 before 4.4.0.Final
4.4.0.Final
org.keycloak:keycloak-saml-adapter-core
Maven
 before 4.4.0.Final, plus listed versions
1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha1
Show 45 moreShow less
1.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final1.9.8.Final2.0.0.CR12.0.0.Final2.1.0.CR12.1.0.Final2.2.0.CR12.2.0.Final2.2.1.Final2.3.0.CR12.3.0.Final2.4.0.CR12.4.0.Final2.5.0.CR12.5.0.Final2.5.1.Final2.5.4.Final2.5.5.Final3.0.0.CR13.0.0.Final3.1.0.CR13.1.0.Final3.2.0.CR13.2.0.Final3.2.1.Final3.3.0.CR13.3.0.CR23.3.0.Final3.4.0.CR13.4.0.Final3.4.1.CR13.4.1.Final3.4.2.Final
4.4.0.Final
org.keycloak:keycloak-services
Maven
 before 4.4.0.Final, plus listed versions
1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4
Show 45 moreShow less
1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final
4.4.0.Final
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7::el6
From an advisory covering 5 CVEs
 before 0:3.4.14-1.Final_redhat_00001.1.jbcs.el6
0:3.4.14-1.Final_redhat_00001.1.jbcs.el6
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7::el6
From an advisory covering 5 CVEs
 before 0:3.4.14-1.Final_redhat_00001.1.jbcs.el6
0:3.4.14-1.Final_redhat_00001.1.jbcs.el6
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7::el7
From an advisory covering 5 CVEs
 before 0:3.4.14-1.Final_redhat_00001.1.jbcs.el7
0:3.4.14-1.Final_redhat_00001.1.jbcs.el7
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7::el7
From an advisory covering 5 CVEs
 before 0:3.4.14-1.Final_redhat_00001.1.jbcs.el7
0:3.4.14-1.Final_redhat_00001.1.jbcs.el7

History

History
RecordedChangedSources
affected, facts
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-10894 is a medium vulnerability (CVSS 5.4) in Keycloak, published August 1, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. Fixed in org.keycloak:keycloak-saml-adapter-core 4.4.0.Final.

References

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