tomcat: Apache Tomcat: Improper Authentication due to principal lookup failure

A flaw was found in Apache Tomcat. This improper authentication vulnerability allows a remote attacker to be authenticated even if their user account does not exist in the DataSourceRealm, under specific circumstances such as CLIENT-CERT or SPNEGO authentication. This can lead to unauthorized...

tomcat: Apache Tomcat: Improper Authentication due to principal lookup failure

A flaw was found in Apache Tomcat. This improper authentication vulnerability allows a remote attacker to be authenticated even if their user account does not exist in the DataSourceRealm, under specific circumstances such as CLIENT-CERT or SPNEGO authentication. This can lead to unauthorized...

CVE-2025-47981

🔵 CVE-2025-47981 — Windows SPNEGO NEGOEX 脆弱性評価スクリプト 種別: 脆弱性評価 — 検出 / コンプライアンスチェック CVE: CVE-2025-47981 CVSS: 9.8 Critical AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE: CWE-122 — ヒープベースのバッファオーバーフロー 別名: "SPNEGO Nightmare" / "Windows Authentication Wormable RCE" パッチ: KB5062560 | 2025年7月 Patch Tuesday...

CVE-2026-46243

🚨 CVE-2026-46243 - CIFSwitch Linux カーネル ローカル権限昇格 LPE Linux カーネルの CIFS/SMB クライアントに影響するローカル権限昇格の脆弱性。 📖 概要 CVE-2026-46243 は、Linux カーネルの CIFS/SMB クライアントにおけるローカル権限昇格（LPE ）の脆弱性です。 cifs.spnego キー記述の検証が不適切なため、特定のシステム構成では、非特権のローカルユーザーがカーネルが生成した信頼済みリクエストを偽装でき、権限昇格につながる可能性があります。 ✨ ハイライト | ---|--- 🆔 CVE|...

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

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...

tomcat: Apache Tomcat: Improper Authentication due to principal lookup failure

A flaw was found in Apache Tomcat. This improper authentication vulnerability allows a remote attacker to be authenticated even if their user account does not exist in the DataSourceRealm, under specific circumstances such as CLIENT-CERT or SPNEGO authentication. This can lead to unauthorized...

Astra Linux – Vulnerability in Heimdal

Before version 7.7.1, Heimdal allowed attackers to cause a NULL pointer dereference in an SPNEGO acceptor, by using a preferredmechtype of GSSCNOOID and a non-zero initialresponse value for sendaccept...

Astra Linux – Vulnerability in bind9

In BIND 9.5.0 - 9.11.29, 9.12.0 - 9.16.13, and versions BIND 9.11.3-S1 - 9.11.29-S1 and 9.16.8-S1 - 9.16.13-S1 of the Supported Preview Edition, as well as release versions 9.17.0 - 9.17.1 of the BIND 9.17 development branch, BIND servers are vulnerable if they are running an affected version and...

Astra Linux – Vulnerability in Tomcat9

There is an improper authentication vulnerability in Apache Tomcat, which means that under certain circumstances e.g., using CLIENT-CERT or SPNEGO, a user can be authenticated even if the user does not exist in the DataSourceRealm. This issue affects Apache Tomcat versions from 11.0.0-M1 through...

BIT-TOMCAT-2026-68569 Apache Tomcat: Principal lookup can fail open in some cases

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0 through 11.0.24, from 10.1.0 through 10.1.57, fr...

Exploit for Heap-based Buffer Overflow in Microsoft

🔵 CVE-2025-47981 — Windows SPNEGO NEGOEX Vulnerability Assessm...

CVE-2026-68569

A flaw was found in Apache Tomcat. This improper authentication vulnerability allows a remote attacker to be authenticated even if their user account does not exist in the DataSourceRealm, under specific circumstances such as CLIENT-CERT or SPNEGO authentication. This can lead to unauthorized...

SUSE CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

Authentication Bypass by Primary Weakness

Overview org.apache.tomcat:tomcat-catalina is a Tomcat Servlet Engine Core Classes and Standard implementations. Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the authentication process when using certain authentication mechanisms such as...

Authentication Bypass by Primary Weakness

Overview org.apache.tomcat:tomcat is an implementation of the Java Servlet, JavaServer Pages, Java Expression Language and Java WebSocket technologies. Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the authentication process when using certain...

Authentication Bypass by Primary Weakness

Overview org.apache.tomcat.embed:tomcat-embed-core is a Core Tomcat implementation. Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the authentication process when using certain authentication mechanisms such as CLIENT-CERT or SPNEGO. An attacker c...

EUVD-2026-66135

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

Linux Distros Unpatched Vulnerability : CVE-2026-68569

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the...

CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...

DEBIAN-CVE-2026-68569

Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances e.g. CLIENT-CERT, SPNEGO that a user would be authenticated even if the user did not exist in the DataSourceRealm. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through...