Improper Authentication

Overview tomcat:catalina is a library that contains Tomcat Servlet Engine Core Classes and Standard implementations. Affected versions of this package are vulnerable to Improper Authentication when DIGEST authentication is configured. An attacker can gain unauthorized access by providing any...

DEBIAN-CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

UBUNTU-CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-43512 Apache Tomcat: Digest authenticator will authenticate any unknown user

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-43512

Apache Tomcat is vulnerable to an authentication bypass issue within its digest authentication mechanism. This flaw allows an unauthenticated attacker to bypass security checks and potentially enhance their privileges remotely. The vulnerability affects versions 11.0.0-M1 through 11.0.21 , 10.1.0...

CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-43512 Apache Tomcat: Digest authenticator will authenticate any unknown user

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

CVE-2026-42855: Improper Authentication

arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, the WebServer Digest authentication implementation in arduino-esp32 computes the authentication hash using the URI field from the client's Authorization header,...

CVE-2026-43512: DEPRECATED: Authentication Bypass Issues

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported...

PT-2026-40455

Name of the Vulnerable Software and Affected Versions arduino-esp32 versions prior to 3.3.8 Description The WebServer Digest authentication implementation computes the authentication hash using the URI field from the client's Authorization header without verifying that it matches the actual...

Apache Tomcat 安全漏洞

Apache Tomcat is a lightweight web application server developed by the Apache Foundation in the United States. It supports Servlet and JavaServer Page JSP technologies. Security vulnerabilities exist in versions of Apache Tomcat ranging from 11.0.0-M1 to 11.0.21, from 10.1.0-M1 to 10.1.54, from...

CLSA-2026-1778490923 httpd: Fix of 9 CVEs

CVE-2026-33857: fix length checks in AJP msgget functions - CVE-2026-34032: fix ajpmsggetstring buffer checks - CVE-2026-34059: fix ajpparsedata message len check - CVE-2026-24072: use APEXPRFLAGRESTRICTED in htaccess - CVE-2026-29169: moddavlock: use the right davlockdiscovery - CVE-2026-33006:...

PT-2026-40071

Name of the Vulnerable Software and Affected Versions Apache Tomcat versions 11.0.0-M1 through 11.0.21 Apache Tomcat versions 10.1.0-M1 through 10.1.54 Apache Tomcat versions 9.0.0.M1 through 9.0.117 Apache Tomcat versions 8.5.0 through 8.5.100 Apache Tomcat versions prior to 7.0.0 Description An...

Fixed in Apache Tomcat 9.0.118

Moderate: Security constraints not correctly applied CVE-2026-43515 When multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. This was fixed with commit db919ff9. This issue was reported to the Tomcat securit...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Apache HTTP Server vulnerabilities (USN-8239-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8239-1 advisory. Bartlomiej Dmitruk and Stanislaw Strzalkowski discovered that Apache HTTP Server incorrectly handled certain memory...

USN-8239-1: Apache HTTP Server vulnerabilities

Bartlomiej Dmitruk and Stanislaw Strzalkowski discovered that Apache HTTP Server incorrectly handled certain memory operations when using the HTTP/2 protocol. A remote attacker could use this issue to cause Apache HTTP Server to crash, resulting in a denial of service, or possibly execute arbitra...

tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication

A flaw was found in Apache Tomcat. When DIGEST authentication was configured, any user not known to the configured Realm would be authenticated if they presented the password "null". This allows a remote attacker to bypass security controls...

BIT-APACHE-2026-33006 Apache HTTP Server: mod_auth_digest timing attack

A timing attack against modauthdigest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue...