CVE-2026-2575— Keycloak: keycloak: denial of service due to excessive samlrequest decompression
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-2575
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Keycloak: keycloak: denial of service due to excessive samlrequest decompression
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于SAML重定向绑定中未强制执行大小限制，可能导致应用程序级拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.10-1 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-12 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-12 ~ * | cpe:/a:redhat:build_keycloak:26.4::el9 | |
| Red Hat | Red Hat build of Keycloak 26.4.10 | - | cpe:/a:redhat:build_keycloak:26.4::el9 |
II. Public POCs for CVE-2026-2575
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-2575
请登录查看更多情报信息。
- 2440149 – (CVE-2026-2575) CVE-2026-2575 keycloak: Keycloak: Denial of Service due to excessive SAMLRequest decompressionissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-2575
Same Patch Batch · Red Hat · 2026-03-18 · 4 CVEs total
| CVE-2026-2603 | 8.1 HIGH | Keycloak: keycloak: unauthorized authentication via disabled saml identity provider |
| CVE-2026-2092 | 7.7 HIGH | Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml |
| CVE-2026-4366 | 5.8 MEDIUM | Keycloak-services: blind server-side request forgery (ssrf) via http redirect handling in |
IV. Related Vulnerabilities
Same product: Red Hat build of Keycloak 26.4
- CVE-2026-3121
Keycloak: org.keycloak/keycloak-services: keycloak: privileg - CVE-2026-3190
Keycloak: keycloak: information disclosure via improper role - CVE-2026-2366
Keycloak: keycloak: information disclosure via authorization - CVE-2026-3429
Org.keycloak.services.resources.account: improper access con - CVE-2026-3911
Org.keycloak.services.resources.admin.userresource: keycloak
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-409
- CVE-2026-27460
Tandoor Recipes Affected by Denial of Service via Recipe Imp - CVE-2026-40148
PraisonAI Affected by Decompression Bomb DoS via Recipe Bund - CVE-2026-39373
JWCrypto: JWE ZIP decompression bomb - CVE-2026-3114
Zip Bomb Denial of Service via Unrestricted Archive Decompre - CVE-2026-32044
OpenClaw < 2026.3.2 - Tar Archive Safety Bypass in Skills In
V. Comments for CVE-2026-2575
No comments yet