7.5

CVE-2026-18212

Keycloak-services: keycloak-services: saml redirect deflate helpers leak native zlib state

A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4.16-2
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4-26
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4
Default Statusaffected
Version 26.4-26
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4.16
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.4.16
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6
Default Statusaffected
Version 26.6.7-3
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6
Default Statusaffected
Version 26.6-20
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat build of Keycloak 26.6
Default Statusaffected
Version 26.6-20
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6.7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6.7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6.7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Data Grid 8
Default Statusaffected
HerstellerRed Hat
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Produkt Red Hat JBoss Enterprise Application Platform Expansion Pack
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Single Sign-On 7
Default Statusaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.52% 0.433
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-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://access.redhat.com/security/cve/CVE-2026-18212
https://bugzilla.redhat.com/show_bug.cgi?id=2508307
https://access.redhat.com/errata/RHSA-2026:68276
https://access.redhat.com/errata/RHSA-2026:68277
https://access.redhat.com/errata/RHSA-2026:68278
https://access.redhat.com/errata/RHSA-2026:68280