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Fencer Intel
medium 6.4

CVE-2026-82968 json

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

published 2mo ago modified 5d ago also EUVD-2026-69800

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-82968 updated cvss 6.4

keycloak-services: keycloak-services: Cross-session email verification proof not bound to upstream identity for social providers

  • Red Hat Single Sign-On 7 keycloak-services 18.0.3.redhat-00001
    affected: workaround, no fix available “Fix deferred”
  • Red Hat build of Keycloak 26.6.8
    fixed: vendor fix RHSA-2026:95761

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected products

  • Red Hat Red Hat build of Keycloak 26.6.8
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.