Keycloak: keycloak: denial of service due to excessive samlrequest decompression
CVSS score
5.3
EPSS probability
%0.9
Risk score
0.0
Published
7 mo ago
Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.
Impact on My Inventory
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-2575 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-2575 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 26.4.10 | View |
| 4 | Red Hat | Red Hat Single Sign-On 7.6.13 | View |
| 5 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 | View |
| 6 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 | View |
| 7 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 | View |
| 8 | Red Hat | RHEL-8 based Middleware Containers | View |
| 9 | redhat | build of keycloak | View |
| 10 | maven | org.keycloak:keycloak-saml-adapter-core | View |
| 11 | maven | org.keycloak:keycloak-saml-core | View |
| 12 | maven | org.keycloak:keycloak-services | View |
| 13 | maven | org.keycloak:keycloak-services | 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 |
|---|---|---|---|---|
| 5.3 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD |
| 5.3 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CVE CNA |
| 5.3 | CVSS 3.x | — | Vector not published | GitHub Advisory |
| 0.0 | CVSS 4.0 | — | Vector not published | GitHub Advisory |
Patch and Remediation Guide
Solution & Remediation Advisory
1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.
26.5.4GitLab Advisory düzeltilmiş sürüm: 26.5.4
Upgrade to version 26.5.4 or above.
Upgrade to version 26.5.4 or above.
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-2026-2575 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-2026-2575 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
Get this vulnerability through the API
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