Keycloak-services: keycloak-services: unauthenticated denial of service via saml soap endpoint unbounded xml parsing
CVSS score
7.5
EPSS probability
—
Risk score
0.8
Published
1 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%55
Short explanation
A flaw was identified in the Keycloak SAML implementation because the SAML Artifact Resolution and ECP SOAP endpoints do not properly limit incoming XML request size or complexity (S0). An unauthenticated remote attacker can exploit this by sending specially crafted large XML messages that cause excessive memory consumption and application crashes, resulting in a denial of service (S0).
This vulnerability poses a significant risk because remote unauthenticated attackers can trigger service outages by causing the application to run out of memory (S0).
What should be done?
- Follow vendor security advisories
- Review available updates and patch status details
- Monitor traffic to SAML SOAP endpoints
Chain of evidence and sources
Keycloak SAML Artifact Resolution ve ECP SOAP uç noktaları, gelen XML isteklerinin boyutunu veya karmaşıklığını yeterince sınırlamamaktadır.
Kimlik doğrulaması gerektirmeyen uzak bir saldırgan, aşırı bellek tüketimine ve uygulamanın çökmesine yol açan büyük XML mesajları gönderebilir.
Show the technical text from the sources
A flaw was found in the SAML implementation of Keycloak, an open-source identity and access management solution. The SAML Artifact Resolution and ECP SOAP endpoints do not properly limit the size or complexity of incoming XML requests. An unauthenticated remote attacker can exploit this by sending specially crafted, large XML messages that cause the server to consume excessive memory. This leads to the application running out of memory and crashing, resulting in a denial of service for all users.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-400
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
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 |
|---|---|---|---|---|
| 7.5 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVE CNA |
| 7.5 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | 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-2026-82965 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-2026-82965 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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