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CVE-2026-97175— Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover

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.

在 Keycloak 服务的 认证器组件中发现一个漏洞，该组件负责处理用户身份联合。当 Keycloak 根据电子邮件地址，将来自外部提供者的传入身份自动关联到现有的本地账户时，未验证该提供者是否已确认该邮箱地址的有效性。攻击者可利用此缺陷，通过在代理提供者（brokered provider）上注册与受害者邮箱相同但未经验证的邮箱，从而接管受害者的账户。

CVSS 8.8 · High

Affected Version Matrix 3

VendorProduct Version RangeStatus
Red Hat Red Hat Build of Keycloak any affected
any affected
Red Hat Red Hat Single Sign-On 7 any unaffected
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I. Basic Information for CVE-2026-97175

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the idp-auto-link authenticator of the keycloak-services component, which handles user identity federation. The issue occurs when Keycloak automatically links an incoming identity from an external provider to an existing local account based on an email address without verifying if the provider has validated that email. This can allow an attacker to take over a victim's account by using a matching unverified email address at a brokered provider.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

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 Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-97175

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III. Intelligence Information for CVE-2026-97175

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Other References for CVE-2026-97175 (1)

Same Patch Batch · Red Hat · 2026-11-05 · 24 CVEs total

CVE-2026-117691 9.1 CRITICAL Keycloak-services: keycloak-services: saml redirect binding signature bypass via percent-e
CVE-2026-121994 8.8 HIGH Gdb: gdb: stack buffer overflow in fetch_register_using_p via unchecked p-reply length
CVE-2026-121996 8.2 HIGH Gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted age
CVE-2026-92857 8.1 HIGH Keycloak-services: keycloak-services: dcr protocol mapper config not validated, allowing i
CVE-2026-121997 8.1 HIGH Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mis
CVE-2026-112208 8.1 HIGH Keycloak-services: keycloak-services: account takeover via stale sso_auth note in organiza
CVE-2026-114232 8.1 HIGH Keycloak-services: keycloak-services: uma protection api resourcetype field not validated
CVE-2026-96453 8.0 HIGH Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbit
CVE-2026-107912 7.7 HIGH Io.quarkus/quarkus-vertx-http: quarkus-vertx-http: authorization bypass in management inte
CVE-2026-107123 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated cpu denial of service via saml xml d
CVE-2026-103112 7.5 HIGH Keycloak-services: keycloak-services: account takeover via authentication race using reset
CVE-2026-107602 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated cpu exhaustion via saml 1.1 keyinfo
CVE-2026-110931 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated jvm termination via saml 1.1 authori
CVE-2026-110932 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated persistent disk exhaustion via theme
CVE-2026-121995 7.5 HIGH Gdb: gdb: stack buffer overflow in parse_tracepoint_definition via stale rs->buf tail
CVE-2026-82965 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated denial of service via saml soap endp
CVE-2026-92855 7.4 HIGH Keycloak-services: keycloak-services: saml broker accepts holder-of-key assertions without
CVE-2026-93998 7.4 HIGH Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configur
CVE-2026-97847 7.1 HIGH Keycloak-services: keycloak-services: client manager can substitute sessionless token prin
CVE-2026-97174 6.8 MEDIUM Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authent

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-287