CVE-2026-2575

mediumpriority · track · 0EPSS 0.009 · 58 %ileDEEUJPUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.87% (58th) EPSS
CVSS 5.3 · medium
Is it mine?
9 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-23

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

5.3
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · secalert@redhat.com USexploitability 3.9 · impact 1.4
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · OSV
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-409USCWE-409US
04

affected products (9)

Products and version ranges known to be affected.

05

advisories (4)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-0416Keycloak: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-02-15csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • GHSA-xv6h-r36f-3gp5Keycloak: Denial of Service due to excessive SAMLRequest decompression2026-03-18ghsa · osvUS

    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.

  • BIT-keycloak-2026-2575Keycloak: keycloak: denial of service due to excessive samlrequest decompression2026-08-25vendor · osvUS

    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.

  • JVNDB-2026-026852JVN iPedia advisory JVNDB-2026-0268522026-08-05vendor · jvndbJP
06

also known as (5)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdosvcert_bundnvdjvndbNVDCVE.orgMITRE
published 2026-03-18modified 2026-06-17
08

references (13)

External citations — patches, advisories, analysis.

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