7.5

CVE-2025-11419

Keycloak: keycloak tls client-initiated renegotiation denial of service

Keycloak TLS Client-Initiated Renegotiation Denial of Service

A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.
Mögliche Gegenmaßnahme
Keycloak Server: Install latest version
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Collection URLhttps://github.com/keycloak/keycloak/
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Paket keycloak
Default Statusunaffected
Version 0
Version < 26.0.16
Status affected
Version 26.1.0
Version < 26.1.*
Status unknown
Version 26.2.0
Version < 26.2.10
Status affected
Version 26.3.0
Version < 26.3.*
Status unknown
Version 26.4.0
Version < 26.4.1
Status affected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.0
Default Statusaffected
Version 26.0.16-2
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.0
Default Statusaffected
Version 26.0-20
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.0
Default Statusaffected
Version 26.0-21
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.0.16
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.2
Default Statusaffected
Version 26.2.10-2
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.2
Default Statusaffected
Version 26.2-11
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.2
Default Statusaffected
Version 26.2-11
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.2.10
Default Statusunaffected
VulnDex Vulnerability Enrichment
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Weitere Schwachstelleninformationen
SystemKeycloak
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Produkt Keycloak Server
Version >= 0.0.0, < 26.0.16
Version >= 26.2.0, < 26.2.10
Version >= 26.4.0, < 26.4.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.73% 0.515
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
RedHat 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

https://access.redhat.com/errata/RHSA-2025:18254
https://access.redhat.com/errata/RHSA-2025:18255
https://access.redhat.com/errata/RHSA-2025:18889
https://access.redhat.com/errata/RHSA-2025:18890
https://access.redhat.com/security/cve/CVE-2025-11419
https://bugzilla.redhat.com/show_bug.cgi?id=2402142
https://github.com/keycloak/keycloak/discussions/25209
https://github.com/keycloak/keycloak/issues/43020
https://github.com/keycloak/keycloak/security/advisories/GHSA-q8hq-4h99-fj7x
Third Party Advisory