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6.4 Medium

CVE-2026-82968 Keycloak-services: keycloak-services: cross-session email verification proof not bound to upstream identity for social providers

Description

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.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

Exploitable remotely over the network, with an ordinary account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
High
Privileges required
Low
Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat Build of Keycloak Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat build of Keycloak 26.6.8 Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat Build of Keycloak

The 276 CVEs of Red Hat Build of Keycloak →
CVE-2026-9797 Keycloak: keycloak: privilege escalation via client authentication manipulation by an authenticated administrator 6.5 Medium CVE-2026-97848 Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization 6.5 Medium CVE-2026-97367 Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover 6.4 Medium CVE-2026-96547 Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles 6.5 Medium
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