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Vulnerability Details :

CVE-2025-11537

Summary
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
Published At-10 Feb, 2026 | 10:53
Updated At-10 Feb, 2026 | 14:32
Rejected At-
Credits

Keycloak-server: sensitive headers shown in the http access logs

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:redhat
Assigner Org ID:53f830b8-0a3f-465b-8143-3b8a9948e749
Published At:10 Feb, 2026 | 10:53
Updated At:10 Feb, 2026 | 14:32
Rejected At:
â–¼CVE Numbering Authority (CNA)
Keycloak-server: sensitive headers shown in the http access logs

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

Affected Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-117Improper Output Neutralization for Logs
Type: CWE
CWE ID: CWE-117
Description: Improper Output Neutralization for Logs
Metrics
VersionBase scoreBase severityVector
3.15.0MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Metrics Other Info
Red Hat severity rating
value:
Moderate
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Exploits

Credits

Timeline
EventDate
Reported to Red Hat.2025-10-09 01:22:16
Made public.2025-10-09 19:17:00
Event: Reported to Red Hat.
Date: 2025-10-09 01:22:16
Event: Made public.
Date: 2025-10-09 19:17:00
Replaced By

Rejected Reason

References
HyperlinkResource
https://access.redhat.com/security/cve/CVE-2025-11537
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2402616
issue-tracking
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2025-11537
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2402616
Resource:
issue-tracking
x_refsource_REDHAT
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secalert@redhat.com
Published At:10 Feb, 2026 | 11:16
Updated At:10 Feb, 2026 | 15:22

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.15.0MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Type: Primary
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-117Primarysecalert@redhat.com
CWE ID: CWE-117
Type: Primary
Source: secalert@redhat.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://access.redhat.com/security/cve/CVE-2025-11537secalert@redhat.com
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=2402616secalert@redhat.com
N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2025-11537
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2402616
Source: secalert@redhat.com
Resource: N/A

Change History

0
Information is not available yet

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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
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Matching Score-6
Assigner-Red Hat, Inc.
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||
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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Action-Not Available
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CWE ID-CWE-532
Insertion of Sensitive Information into Log File
CWE ID-CWE-117
Improper Output Neutralization for Logs
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Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.34% / 56.25%
||
7 Day CHG~0.00%
Published-25 Apr, 2024 | 15:58
Updated-21 Nov, 2025 | 06:23
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Keycloak: log injection during webauthn authentication or registration

A log injection flaw was found in Keycloak. A text string may be injected through the authentication form when using the WebAuthn authentication mode. This issue may have a minor impact to the logs integrity.

Action-Not Available
Vendor-Red Hat, Inc.
Product-RHSSO 7.6.8Red Hat Single Sign-On 7Red Hat Single Sign-On 7.6 for RHEL 9Red Hat Single Sign-On 7.6 for RHEL 7Red Hat build of Keycloak 22.0.10Red Hat Single Sign-On 7.6 for RHEL 8RHEL-8 based Middleware ContainersRed Hat build of Keycloak 22
CWE ID-CWE-117
Improper Output Neutralization for Logs
CVE-2020-14332
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.15% / 35.42%
||
7 Day CHG~0.00%
Published-11 Sep, 2020 | 17:59
Updated-04 Aug, 2024 | 12:39
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A flaw was found in the Ansible Engine when using module_args. Tasks executed with check mode (--check-mode) do not properly neutralize sensitive data exposed in the event data. This flaw allows unauthorized users to read this data. The highest threat from this vulnerability is to confidentiality.

Action-Not Available
Vendor-Debian GNU/LinuxRed Hat, Inc.
Product-ansible_enginedebian_linuxAnsible
CWE ID-CWE-117
Improper Output Neutralization for Logs
CWE ID-CWE-532
Insertion of Sensitive Information into Log File
Details not found