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CVE-2026-93998— Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer

Quick assessment

Affected

Red Hat Red Hat AMQ Broker 7

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 的 SAML 适配器组件中发现了一个安全漏洞，该组件用于通过基于 SAML 的身份验证来保护应用程序。该适配器未能验证已签名的 SAML 断言的颁发者是否与应用程序配置的预期身份提供者（IdP）相匹配。如果多个身份提供者共享同一个受信任的签名密钥，则控制其中任意一个提供者的攻击者可以生成一个有效签名的断言，从而以任意用户的身份登录该应用程序，甚至可能获得完全的管理员控制权。

CVSS 7.4 · High Updated Nov 06, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

Vendor	Product	Version Range	Status
Red Hat	Red Hat AMQ Broker 7	`any`	unaffected
Red Hat	Red Hat Build of Keycloak	`any`	affected
		`any`	affected
		`any`	affected
		`any`	affected
		`any`	affected
Red Hat	Red Hat Fuse 7	`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7	`any`	unaffected
		`any`	unaffected
		`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8	`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	`any`	unaffected
Red Hat	Red Hat Satellite 6	`any`	unaffected
Red Hat	Red Hat Single Sign-On 7	`any`	unaffected

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Vulnerability Information

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Vulnerability Title

Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer

Source: CVE Program / CVE List V5

Vulnerability Description

A flaw was found in the SAML adapter component of Keycloak, which is used to secure applications with SAML-based authentication. The adapter fails to verify that the issuer of a signed SAML assertion matches the expected identity provider configured for the application. If multiple identity providers share the same trusted signing key, an attacker who controls one of those providers can create a validly signed assertion to log into the application as any user, potentially gaining full administrative control.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

密码学签名的验证不恰当

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat AMQ Broker 7	-	`cpe:/a:redhat:amq_broker:7`
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 Build of Keycloak	-	`cpe:/a:redhat:build_keycloak:`
Red Hat	Red Hat Build of Keycloak	-	`cpe:/a:redhat:build_keycloak:`
Red Hat	Red Hat Fuse 7	-	`cpe:/a:redhat:jboss_fuse:7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7	-	`cpe:/a:redhat:jboss_enterprise_application_platform:7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7	-	`cpe:/a:redhat:jboss_enterprise_application_platform:7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7	-	`cpe:/a:redhat:jboss_enterprise_application_platform:7`
Red Hat	Red Hat JBoss Enterprise Application Platform 8	-	`cpe:/a:redhat:jboss_enterprise_application_platform:8`
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	-	`cpe:/a:redhat:jbosseapxp`
Red Hat	Red Hat Satellite 6	-	`cpe:/a:redhat:satellite:6`
Red Hat	Red Hat Single Sign-On 7	-	`cpe:/a:redhat:red_hat_single_sign_on:7`

II. Public POCs for CVE-2026-93998

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-93998

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Other References for CVE-2026-93998 (2)

https://access.redhat.com/security/cve/CVE-2026-93998 vdb-entry x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2537164 issue-tracking x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2026-93998

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-2026-97175	8.8 HIGH	Keycloak-services: keycloak-services: unverified idp email auto-linking enables account ta
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-2026-114232	8.1 HIGH	Keycloak-services: keycloak-services: uma protection api resourcetype field not validated
CVE-2026-112208	8.1 HIGH	Keycloak-services: keycloak-services: account takeover via stale sso_auth note in organiza
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-2026-121995	7.5 HIGH	Gdb: gdb: stack buffer overflow in parse_tracepoint_definition via stale rs->buf tail
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-2026-82965	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-2026-97847	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 AMQ Broker 7

Same vendor: Red Hat

Same weakness: CWE-347