CVE-2026-95503— Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled
一分钟漏洞结论
影响对象
Red Hat Red Hat Build of Keycloak
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
A flaw was found in the Kerberos federation provider of Keycloak, an open-source identity and access management solution. When Kerberos password authentication is used without SPNEGO, the system fails to verify the identity of the Key Distribution Center (KDC)
影响版本矩阵 4
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Red Hat | Red Hat Build of Keycloak | 全部 |
affected |
全部 |
affected | ||
全部 |
affected | ||
| Red Hat | Red Hat Single Sign-On 7 | 全部 |
affected |
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一、 漏洞 CVE-2026-95503 基础信息
漏洞信息
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Vulnerability Title
Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Kerberos federation provider of Keycloak, an open-source identity and access management solution. When Kerberos password authentication is used without SPNEGO, the system fails to verify the identity of the Key Distribution Center (KDC) by requesting a server ticket. This allows an attacker on the same network to spoof the KDC and bypass the authentication process, potentially gaining unauthorized access to user accounts.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| 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
|
|
二、漏洞 CVE-2026-95503 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-95503 厂商安全公告 (2)
同批安全公告 · Red Hat · 2026-09-22 · 共 6 条
| CVE-2026-13087 | 8.8 HIGH | Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path... |
| CVE-2026-95619 | 7.7 HIGH | Gcc: libstdc++ integer overflow in `new` operator |
| CVE-2026-94640 | 7.5 HIGH | Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated |
| CVE-2026-95508 | 7.4 HIGH | Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interfa |
| CVE-2026-90462 | 5.4 MEDIUM | Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization |
IV. Related Vulnerabilities
Same vendor: Red Hat
-
CVE-2026-13087
Kernel: heap out-of-bounds write in the linux kernel rpc-ove -
CVE-2026-90462
Sssd: sssd: fail-open in ldap ppolicy access check allows co -
CVE-2026-94640
Rpcbind: unbounded memory allocation in rpcbind statistics t -
CVE-2026-95619
Gcc: libstdc++ integer overflow in `new` operator -
CVE-2026-95508
Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp resp
Same weakness: CWE-347
-
CVE-2026-85995
Notepad++: Authenticode verification bypass allows modified -
CVE-2026-75939
Openshift/oc-mirror: release signature verification: openpgp -
CVE-2026-94368
Noobaa-core: noobaa-core: presigned put url escalation to co -
CVE-2026-9832
Stripe for WooCommerce 5.0.8 签名验证漏洞 -
CVE-2026-59163
Mnemosyne 服务器 JWT签名验证绕过漏洞
V. Comments for CVE-2026-95503
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