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CVE-2026-110932— Keycloak-services: keycloak-services: unauthenticated persistent disk exhaustion via theme gzip cache

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.

在开源身份与访问管理解决方案 Keycloak 的主题资源端点中发现了一个漏洞。该问题源于服务器在使用主题名称作为磁盘 gzip 缓存的键之前，未对其进行验证。未经身份验证的攻击者可以通过发送大量包含唯一伪造主题名称的请求来利用此漏洞，导致磁盘空间持续耗尽。这种耗尽状态在服务器重启后依然存在，并可能引发服务中断。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-110932

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: unauthenticated persistent disk exhaustion via theme gzip cache
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the theme resource endpoint of Keycloak, an open-source identity and access management solution. The issue occurs because the server fails to validate theme names before using them as keys for an on-disk gzip cache. An unauthenticated attacker can exploit this by sending many requests with unique, fabricated theme names, leading to persistent disk space exhaustion that survives server restarts and causes service disruptions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
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-2026-110932

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III. Intelligence Information for CVE-2026-110932

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Other References for CVE-2026-110932 (2)

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-2026-112208 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-2026-121997 8.1 HIGH Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mis
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-2026-82965 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated denial of service via saml soap endp
CVE-2026-110931 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated jvm termination via saml 1.1 authori
CVE-2026-107602 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated cpu exhaustion via saml 1.1 keyinfo
CVE-2026-103112 7.5 HIGH Keycloak-services: keycloak-services: account takeover via authentication race using reset
CVE-2026-107123 7.5 HIGH Keycloak-services: keycloak-services: unauthenticated cpu denial of service via saml xml d
CVE-2026-93998 7.4 HIGH Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configur
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 Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-400