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16 vulnerabilities found for Red Hat build of Keycloak 26.4.10 by Red Hat
CVE-2026-2575 (GCVE-0-2026-2575)
Vulnerability from nvd – Published: 2026-03-18 03:19 – Updated: 2026-03-18 13:34
VLAI?
Title
Keycloak: keycloak: denial of service due to excessive samlrequest decompression
Summary
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
Severity ?
5.3 (Medium)
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|||||||||||||||||
|
|||||||||||||||||||
Date Public ?
2026-02-16 08:08
Credits
Red Hat would like to thank Sho Odagiri (GMO Cybersecurity by Ierae, Inc.) for reporting this issue.
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CVE-2026-2603 (GCVE-0-2026-2603)
Vulnerability from nvd – Published: 2026-03-18 01:14 – Updated: 2026-03-18 14:10
VLAI?
Title
Keycloak: keycloak: unauthorized authentication via disabled saml identity provider
Summary
A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.
Severity ?
8.1 (High)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:23
Credits
Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.
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CVE-2026-2092 (GCVE-0-2026-2092)
Vulnerability from nvd – Published: 2026-03-18 01:14 – Updated: 2026-03-18 14:11
VLAI?
Title
Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml assertions
Summary
A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.
Severity ?
7.7 (High)
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 12:34
Credits
Red Hat would like to thank Oleh Konko for reporting this issue.
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CVE-2026-3047 (GCVE-0-2026-3047)
Vulnerability from nvd – Published: 2026-03-05 18:28 – Updated: 2026-03-06 18:13
VLAI?
Title
Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login
Summary
A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.
Severity ?
8.8 (High)
CWE
- CWE-305 - Authentication Bypass by Primary Weakness
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:24
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CVE-2026-3009 (GCVE-0-2026-3009)
Vulnerability from nvd – Published: 2026-03-05 18:27 – Updated: 2026-03-24 11:28
VLAI?
Title
Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)
Summary
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
Severity ?
8.1 (High)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:23
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CVE-2026-2733 (GCVE-0-2026-2733)
Vulnerability from nvd – Published: 2026-02-19 07:48 – Updated: 2026-03-06 03:31
VLAI?
Title
Org.keycloak/keycloak-services: keycloak: missing check on disabled client for docker registry protocol
Summary
A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.
Severity ?
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-02-19 00:00
Credits
Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.
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CVE-2026-1190 (GCVE-0-2026-1190)
Vulnerability from nvd – Published: 2026-01-26 19:36 – Updated: 2026-03-06 03:31
VLAI?
Title
Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata
Summary
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Severity ?
CWE
- CWE-112 - Missing XML Validation
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-01-19 08:08
Credits
Red Hat would like to thank Franz Bettag (Bettag Systems) for reporting this issue.
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CVE-2026-0707 (GCVE-0-2026-0707)
Vulnerability from nvd – Published: 2026-01-08 03:41 – Updated: 2026-03-06 03:17
VLAI?
Title
Keycloak: keycloak authorization header parsing leading to potential security control bypass
Summary
A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.
Severity ?
5.3 (Medium)
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|||||||||||||||||
|
|||||||||||||||||||
Date Public ?
2026-01-07 00:00
Credits
Red Hat would like to thank Guanping Zhang for reporting this issue.
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CVE-2026-2575 (GCVE-0-2026-2575)
Vulnerability from cvelistv5 – Published: 2026-03-18 03:19 – Updated: 2026-03-18 13:34
VLAI?
Title
Keycloak: keycloak: denial of service due to excessive samlrequest decompression
Summary
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
Severity ?
5.3 (Medium)
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|||||||||||||||||
|
|||||||||||||||||||
Date Public ?
2026-02-16 08:08
Credits
Red Hat would like to thank Sho Odagiri (GMO Cybersecurity by Ierae, Inc.) for reporting this issue.
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CVE-2026-2603 (GCVE-0-2026-2603)
Vulnerability from cvelistv5 – Published: 2026-03-18 01:14 – Updated: 2026-03-18 14:10
VLAI?
Title
Keycloak: keycloak: unauthorized authentication via disabled saml identity provider
Summary
A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.
Severity ?
8.1 (High)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:23
Credits
Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.
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CVE-2026-2092 (GCVE-0-2026-2092)
Vulnerability from cvelistv5 – Published: 2026-03-18 01:14 – Updated: 2026-03-18 14:11
VLAI?
Title
Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml assertions
Summary
A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.
Severity ?
7.7 (High)
CWE
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
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Date Public ?
2026-03-05 12:34
Credits
Red Hat would like to thank Oleh Konko for reporting this issue.
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CVE-2026-3047 (GCVE-0-2026-3047)
Vulnerability from cvelistv5 – Published: 2026-03-05 18:28 – Updated: 2026-03-06 18:13
VLAI?
Title
Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login
Summary
A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.
Severity ?
8.8 (High)
CWE
- CWE-305 - Authentication Bypass by Primary Weakness
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:24
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CVE-2026-3009 (GCVE-0-2026-3009)
Vulnerability from cvelistv5 – Published: 2026-03-05 18:27 – Updated: 2026-03-24 11:28
VLAI?
Title
Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)
Summary
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
Severity ?
8.1 (High)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
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(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-03-05 11:23
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CVE-2026-2733 (GCVE-0-2026-2733)
Vulnerability from cvelistv5 – Published: 2026-02-19 07:48 – Updated: 2026-03-06 03:31
VLAI?
Title
Org.keycloak/keycloak-services: keycloak: missing check on disabled client for docker registry protocol
Summary
A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.
Severity ?
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-02-19 00:00
Credits
Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.
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CVE-2026-1190 (GCVE-0-2026-1190)
Vulnerability from cvelistv5 – Published: 2026-01-26 19:36 – Updated: 2026-03-06 03:31
VLAI?
Title
Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata
Summary
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Severity ?
CWE
- CWE-112 - Missing XML Validation
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
Date Public ?
2026-01-19 08:08
Credits
Red Hat would like to thank Franz Bettag (Bettag Systems) for reporting this issue.
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CVE-2026-0707 (GCVE-0-2026-0707)
Vulnerability from cvelistv5 – Published: 2026-01-08 03:41 – Updated: 2026-03-06 03:17
VLAI?
Title
Keycloak: keycloak authorization header parsing leading to potential security control bypass
Summary
A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.
Severity ?
5.3 (Medium)
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|||||||||||||||||
|
|||||||||||||||||||
Date Public ?
2026-01-07 00:00
Credits
Red Hat would like to thank Guanping Zhang for reporting this issue.
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