Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-95503— Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled

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.

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)

CVSS 6.8 · Medium EPSS 0.13% · P3

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat Build of Keycloak any affected
any affected
any affected
Red Hat Red Hat Single Sign-On 7 any affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-95503

Vulnerability Information

Shenlong is analyzing...

Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled
Source: 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.
Source: 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
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 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 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-2026-95503

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-95503

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-95503 (2)

Same Patch Batch · Red Hat · 2026-09-22 · 6 CVEs total

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 product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-347

V. Comments for CVE-2026-95503

No comments yet

Leave a comment