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CVE-2025-12390— Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id

CVSS 6.0 · Medium EPSS 0.13% · P3

Affected Version Matrix 9

VendorProductVersion RangeStatus
Keycloakkeycloak< 26.0.0affected
Red HatRed Hat build of Keycloak 26.226.2.11-1< *unaffected
26.2-12< *unaffected
26.2-12< *unaffected
Red HatRed Hat build of Keycloak 26.2.11anyunaffected
Red HatRed Hat build of Keycloak 26.426.4.4-1< *unaffected
26.4-3< *unaffected
26.4-3< *unaffected
Red HatRed Hat build of Keycloak 26.4.4anyunaffected
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I. Basic Information for CVE-2025-12390

Vulnerability Information
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Vulnerability Title
Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
会话固定
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat build of Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat build of Keycloak是美国红帽（Red Hat）公司的一款用于单点登录的Web应用。 Red Hat build of Keycloak存在授权问题漏洞，该漏洞源于会话标识符重用和注销时未正确清理，可能导致用户意外获取其他用户的会话令牌。
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

VendorProductAffected VersionsCPESubscribe
Keycloakkeycloak 0 ~ 26.0.0 -
Red HatRed Hat build of Keycloak 26.2 26.2.11-1 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red HatRed Hat build of Keycloak 26.2 26.2-12 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red HatRed Hat build of Keycloak 26.2 26.2-12 ~ * cpe:/a:redhat:build_keycloak:26.2::el9
Red HatRed Hat build of Keycloak 26.2.11-cpe:/a:redhat:build_keycloak:26.2::el9
Red HatRed Hat build of Keycloak 26.4 26.4.4-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red HatRed Hat build of Keycloak 26.4 26.4-3 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red HatRed Hat build of Keycloak 26.4 26.4-3 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red HatRed Hat build of Keycloak 26.4.4-cpe:/a:redhat:build_keycloak:26.4::el9

II. Public POCs for CVE-2025-12390

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III. Intelligence Information for CVE-2025-12390

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Vendor Advisories for CVE-2025-12390 (3)

Other References for CVE-2025-12390 (1)

IV. Related Vulnerabilities

Same product: keycloak
Same vendor: Keycloak
Same weakness: CWE-384

V. Comments for CVE-2025-12390

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