CVE-2026-75973 Security Details

CVE ID

CVE-2026-75973

CWE

CWE-287

CVE Description

Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.

Published

Sep 25, 2026

CVSS Score & Severity

8.2High

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS Score

0.518%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

org/apache/catalina/authenticator/jaspic/SimpleAuthConfigProvider.getServerAuthConfig(Ljava/lang/String;Ljava/lang/String;Ljavax/security/auth/callback/CallbackHandler;)Ljakarta/security/auth/message/config/ServerAuthConfig;

JVMVulnerable params: 1

org/apache/catalina/authenticator/jaspic/SimpleAuthConfigProvider.getServerAuthConfig(Ljava/lang/String;Ljava/lang/String;Ljavax/security/auth/callback/CallbackHandler;)Ljavax/security/auth/message/config/ServerAuthConfig;

JVMVulnerable params: 1

Affected Ecosystems

affected

Source

National Vulnerability Database

References

Apache · AnnouncementPROJECT