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10 vulnerabilities found for Red Hat build of Keycloak 26.2.15 by Red Hat
CVE-2026-4636 (GCVE-0-2026-4636)
Vulnerability from nvd – Published: 2026-04-02 12:45 – Updated: 2026-04-02 16:35
VLAI?
Title
Keycloak: keycloak: uma policy bypass allows authenticated users to gain unauthorized access to victim-owned resources.
Summary
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.
Severity ?
8.1 (High)
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 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
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CVE-2026-4634 (GCVE-0-2026-4634)
Vulnerability from nvd – Published: 2026-04-02 12:44 – Updated: 2026-04-03 17:23
VLAI?
Title
Keycloak: keycloak: denial of service via excessive processing of openid connect scope parameters
Summary
A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with an excessively long scope parameter to the OpenID Connect (OIDC) token endpoint. This leads to high resource consumption and prolonged processing times, ultimately resulting in a Denial of Service (DoS) for the Keycloak server.
Severity ?
7.5 (High)
CWE
- CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
Credits
Red Hat would like to thank Slvrqn for reporting this issue.
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CVE-2026-4325 (GCVE-0-2026-4325)
Vulnerability from nvd – Published: 2026-04-02 12:44 – Updated: 2026-04-02 16:39
VLAI?
Title
Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise.
Severity ?
5.3 (Medium)
CWE
- CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
Credits
Red Hat would like to thank Ngọc Chung Kim for reporting this issue.
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CVE-2026-4282 (GCVE-0-2026-4282)
Vulnerability from nvd – Published: 2026-04-02 12:44 – Updated: 2026-04-02 16:34
VLAI?
Title
Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
Severity ?
7.4 (High)
CWE
- CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
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CVE-2026-3872 (GCVE-0-2026-3872)
Vulnerability from nvd – Published: 2026-04-02 12:37 – Updated: 2026-04-02 16:34
VLAI?
Title
Keycloak: keycloak: information disclosure due to redirect_uri validation bypass
Summary
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
Severity ?
7.3 (High)
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
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CVE-2026-4636 (GCVE-0-2026-4636)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:45 – Updated: 2026-04-02 16:35
VLAI?
Title
Keycloak: keycloak: uma policy bypass allows authenticated users to gain unauthorized access to victim-owned resources.
Summary
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.
Severity ?
8.1 (High)
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 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
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Date Public ?
2026-04-02 12:30
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CVE-2026-4634 (GCVE-0-2026-4634)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:44 – Updated: 2026-04-03 17:23
VLAI?
Title
Keycloak: keycloak: denial of service via excessive processing of openid connect scope parameters
Summary
A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with an excessively long scope parameter to the OpenID Connect (OIDC) token endpoint. This leads to high resource consumption and prolonged processing times, ultimately resulting in a Denial of Service (DoS) for the Keycloak server.
Severity ?
7.5 (High)
CWE
- CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
Credits
Red Hat would like to thank Slvrqn for reporting this issue.
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CVE-2026-4325 (GCVE-0-2026-4325)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:44 – Updated: 2026-04-02 16:39
VLAI?
Title
Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise.
Severity ?
5.3 (Medium)
CWE
- CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
Credits
Red Hat would like to thank Ngọc Chung Kim for reporting this issue.
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CVE-2026-4282 (GCVE-0-2026-4282)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:44 – Updated: 2026-04-02 16:34
VLAI?
Title
Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw
Summary
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
Severity ?
7.4 (High)
CWE
- CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
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CVE-2026-3872 (GCVE-0-2026-3872)
Vulnerability from cvelistv5 – Published: 2026-04-02 12:37 – Updated: 2026-04-02 16:34
VLAI?
Title
Keycloak: keycloak: information disclosure due to redirect_uri validation bypass
Summary
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
Severity ?
7.3 (High)
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.2 |
Unaffected:
26.2.15-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.2::el9 |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
Date Public ?
2026-04-02 12:30
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