Medium [CVE-2026-82968] Keycloak-services: keycloak-services: cross-session email verification proof not bound to upstream identity for social providers
This medium-severity Red Hat Linux advisory covers CVE-2026-82968 affecting Red Hat Build of Keycloak, Red Hat Single Sign-On 7.
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Summary
A flaw was found in the first-broker-login flow of the Keycloak identity management service. When a user links a social identity provider account to their local account, the verification proof generated is not strictly bound to the specific upstream identity being verified.
This allows an attacker with a different account on the same social provider to intercept the process and link their own account to the victim's local profile, gaining unauthorized access.
The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that exploitation requires specific timing and user interaction during an active account-linking process. The vulnerability's root cause is the failure to bind the cross-session verification proof to the specific upstream identity for social providers.
Weakness: CWE-639. Affected Red Hat products: Red Hat Build of Keycloak; Red Hat Single Sign-On 7.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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