Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| Red Hat | Red Hat build of Keycloak 26.6 | affected |
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| Red Hat | Red Hat build of Keycloak 26.6 | affected |
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| Red Hat | Red Hat build of Keycloak 26.6 | affected |
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| Red Hat | Red Hat build of Keycloak 26.6.6 | unaffected | — | ||||||
| Red Hat | Red Hat build of Keycloak 26.6.6 | unaffected | — | ||||||
| Red Hat | Red Hat build of Keycloak 26.6.6 | unaffected | — | ||||||
| Red Hat | Red Hat Data Grid 8 | unaffected | — | ||||||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected | — | ||||||
| Red Hat | Red Hat Single Sign-On 7 | unaffected | — |
No data.
| Package | CPE | Advisory | Released Date |
|---|---|---|---|
| Red Hat build of Keycloak 26.6 | |||
| keycloak-rhel9-container-26.6-12 | cpe:/a:redhat:build_keycloak:26.6::el9 | RHSA-2026:56524 | 2026-08-18T00:00:00Z |
| keycloak-rhel9-operator-bundle-container-26.6.6-1 | cpe:/a:redhat:build_keycloak:26.6::el9 | RHSA-2026:56524 | 2026-08-18T00:00:00Z |
| keycloak-rhel9-operator-container-26.6-12 | cpe:/a:redhat:build_keycloak:26.6::el9 | RHSA-2026:56524 | 2026-08-18T00:00:00Z |
| Red Hat build of Keycloak 26.6.6 | |||
| keycloak-services | cpe:/a:redhat:build_keycloak:26.6 | RHSA-2026:56523 | 2026-08-18T00:00:00Z |
| rhbk/keycloak-rhel9 | cpe:/a:redhat:build_keycloak:26.6 | RHSA-2026:56523 | 2026-08-18T00:00:00Z |
| rhbk-openshift-rhel9/rhbk-openshift-rhel9 | cpe:/a:redhat:build_keycloak:26.6 | RHSA-2026:56523 | 2026-08-18T00:00:00Z |
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Redhat | Build Of Keycloak |
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| Redhat | Data Grid 8 |
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| Redhat | Jboss Enterprise Application Platform Expansion Pack |
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| Redhat | Single Sign On |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.430% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat build Of Keycloak
Redhat data Grid 8 Redhat jboss Enterprise Application Platform Expansion Pack Redhat single Sign On |
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| Vendors & Products |
Redhat build Of Keycloak
Redhat data Grid 8 Redhat jboss Enterprise Application Platform Expansion Pack Redhat single Sign On |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| References |
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| Metrics |
threat_severity
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threat_severity
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| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/a:redhat:build_keycloak:26.6::el9 | |
| References |
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client | |
| First Time appeared |
Redhat
Redhat build Keycloak Redhat jboss Data Grid Redhat jbosseapxp Redhat red Hat Single Sign On |
|
| Weaknesses | CWE-341 | |
| CPEs | cpe:/a:redhat:build_keycloak:26.6 cpe:/a:redhat:jboss_data_grid:8 cpe:/a:redhat:jbosseapxp cpe:/a:redhat:red_hat_single_sign_on:7 |
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| Vendors & Products |
Redhat
Redhat build Keycloak Redhat jboss Data Grid Redhat jbosseapxp Redhat red Hat Single Sign On |
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| References |
| |
| Metrics |
cvssV3_1
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