CVE-2026-82965: falha de alta gravidade em Red Hat build of Keycloak 26.4
Keycloak-services: keycloak-services: unauthenticated denial of service via saml soap endpoint unbounded xml parsing
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.6%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
Red Hat · Red Hat build of Keycloak 26.4Red Hat · Red Hat build of Keycloak 26.4.17Red Hat · Red Hat build of Keycloak 26.6Red Hat · Red Hat build of Keycloak 26.6.8Red Hat · Red Hat Single Sign-On 7CVEs relacionadas — Red Hat build of Keycloak 26.4
No mesmo produto, das mais perigosas para as menos.
CVE-2026-18963CRITICALKeycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypassEPSS 6.6%CVE-2026-93567HIGHIo.netty/netty-codec-http2: http/1 authority-form connect is translated to malformed http/2 connect with host-controlled :authorityEPSS 2.9%CVE-2026-93569HIGHIo.netty/netty-codec-http2: http/1 absolute-form host mismatch is translated to http/2 :authority, overriding the request-target authorityEPSS 2.4%CVE-2026-93574MEDIUMIo.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsingEPSS 1.7%CVE-2026-93558HIGHIo.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of serviceEPSS 1.2%CVE-2026-93579MEDIUMIo.netty/netty-codec-http2: netty: http/2 header field values are not validated by default (cr/lf/nul passthrough)EPSS 1.1%
Referências
https://access.redhat.com/errata/RHSA-2026:95759https://access.redhat.com/errata/RHSA-2026:95760https://access.redhat.com/errata/RHSA-2026:95761https://access.redhat.com/errata/RHSA-2026:95762https://access.redhat.com/security/cve/CVE-2026-82965https://bugzilla.redhat.com/show_bug.cgi?id=2526302