Keycloak-services: keycloak-services: saml broker metadata import disables response signature validation
CVSS score
7.4
EPSS probability
%0.3
Risk score
0.0
Published
2 mo ago
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Impact on My Inventory
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
A high-severity vulnerability in Keycloak's SAML metadata import allows unauthenticated attackers to forge SAML responses and gain unauthorized access to user accounts. No official patch status is available. The issue affects Red Hat Build of Keycloak and related products. No active exploitation is confirmed.
This flaw allows attackers to bypass signature validation and impersonate users, leading to unauthorized access. It affects identity management systems and poses a significant risk to user data integrity. No patch status is confirmed, leaving systems exposed until official remediation is released.
What should be done?
- Follow official Red Hat advisory for patching
- Do not use SAML metadata import without validation
- Monitor for CVE-2026-16443 in production environments
Chain of evidence and sources
Red Hat Build of Keycloak'da Keycloak-services bileşeninin SAML metadatı içeriği ile ilgili bir eksiklik, dış kimlik bilgisi bilinen bir kullanıcıya karşı, bir SAML yanıtı oluşturarak ve yetkisiz erişim kazanma imkanı sunar.
Eksiklik, CVSS 3.1 puanı 7.4 ile yüksek önem taşır ve kimlik doğrulama gerekmez, yüksek gizlilik ve bütünlük etkisi vardır.
Resmî yama durumu mevcut değildir; yama değerlendirmesi BILINMEYEN olarak işaretlenmiştir ve güvenilir kanıt yoktur.
Show the technical text from the sources
A flaw was found in the SAML metadata import functionality of the keycloak-services component, which is the core engine for identity brokering in Red Hat Build of Keycloak. When importing identity provider metadata that lacks specific usage attributes for keys, the system incorrectly disables signature validation for SAML responses even if a signing certificate is provided. This issue allows an unauthenticated attacker to forge a SAML response and gain unauthorized access to a user account by knowing their external identifier.
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-347
Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-16443 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat build of Keycloak 26.4 | View |
| 2 | Red Hat | Red Hat build of Keycloak 26.4 | View |
| 3 | Red Hat | Red Hat build of Keycloak 26.4.14 | View |
| 4 | Red Hat | Red Hat build of Keycloak 26.6 | View |
| 5 | Red Hat | Red Hat build of Keycloak 26.6 | View |
| 6 | Red Hat | Red Hat build of Keycloak 26.6.5 | View |
| 7 | Red Hat | Red Hat Data Grid 8 | View |
| 8 | Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | View |
| 9 | Red Hat | Red Hat Single Sign-On 7 | View |
| 10 | redhat | build of keycloak | View |
| 11 | redhat | build of keycloak | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 9.1 | CVSS V31 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD |
| 7.4 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CVE CNA |
| 7.4 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-16443 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-16443 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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