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

Quick assessment

Affected
Red Hat Red Hat Build of Keycloak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak组织开源的一款身份认证与权限管理平台。 Keycloak存在授权问题漏洞，该漏洞源于first-broker-login流程中生成的验证证明未严格绑定到被验证的特定上游身份，可能导致攻击者使用同一社交提供商的不同账户拦截该流程，并将自身账户链接到受害者的本地配置文件，从而获得未经授权的访问。

CVSS 6.4 · Medium EPSS 0.28% · P19

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat Build of Keycloak any affected
any affected
any affected
Red Hat Red Hat Single Sign-On 7 any affected
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I. Basic Information for CVE-2026-82968

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: cross-session email verification proof not bound to upstream identity for social providers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一款身份认证与权限管理平台。 Keycloak存在授权问题漏洞，该漏洞源于first-broker-login流程中生成的验证证明未严格绑定到被验证的特定上游身份，可能导致攻击者使用同一社交提供商的不同账户拦截该流程，并将自身账户链接到受害者的本地配置文件，从而获得未经授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-82968

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III. Intelligence Information for CVE-2026-82968

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Vendor Advisories for CVE-2026-82968 (1)

Same Patch Batch · Red Hat · 2026-09-02 · 8 CVEs total

CVE-2026-66786 9.1 CRITICAL Submariner: submariner: ipsec.conf stanza injection via remote-supplied cablename and subn
CVE-2026-78408 7.9 HIGH Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority
CVE-2026-84838 7.8 HIGH Rpm: command injection in rpmuncompress via unescaped filenames passed to popen()
CVE-2026-84837 7.8 HIGH Rpm: command injection in `rpmbuild -t*` (`gettarspec`) via unescaped tarball path
CVE-2026-78410 7.8 HIGH Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.own
CVE-2026-78409 7.0 HIGH Util-linux: util-linux: x-mount.subdir detached-tree resolution can escape via intermediat
CVE-2026-53683 4.3 MEDIUM Freeipa: idm: idm/freeipa web ui - client-side open redirect in reset_password.html

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-82968

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