7.3

CVE-2026-15571

Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC client. By tricking a user into authenticating, an attacker-controlled client can forge a valid linking URL to connect the victim's account to an attacker's external identity. This results in a full account takeover, allowing the attacker to log in as the victim.
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 26.6
Default Statusaffected
Version 26.6.6-1
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6
Default Statusaffected
Version 26.6-12
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat build of Keycloak 26.6
Default Statusaffected
Version 26.6-12
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat build of Keycloak 26.6.6
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat build of Keycloak 26.6.6
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat build of Keycloak 26.6.6
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Data Grid 8
Default Statusunaffected
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 Statusunaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.31% 0.236
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
RedHat 7.3 2.1 5.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CWE-341 Predictable from Observable State

A number or object is predictable based on observations that the attacker can make about the state of the system or network, such as time, process ID, etc.

https://access.redhat.com/errata/RHSA-2026:56523
https://access.redhat.com/security/cve/CVE-2026-15571
https://bugzilla.redhat.com/show_bug.cgi?id=2499591
https://access.redhat.com/errata/RHSA-2026:56524