tomcat: Apache Tomcat: Access control bypass due to off-by-one error in RewriteValve [N] flag processing

A flaw was found in Apache Tomcat. An off-by-one error in the RewriteValve's N flag processing causes rewrite rules to restart at the second rule instead of the first. This vulnerability may allow an attacker to bypass intended access controls...

The vulnerability of the rewrite mechanism (RewriteValve) of the Apache Tomcat application server allows a hacker to circumvent access control restrictions.

The vulnerability of the rewrite mechanism RewriteValve in the Apache Tomcat application server is related to the implementation of incorrect flow control. Exploiting this vulnerability allows a malicious actor to circumvent access control restrictions...

Apache Tomcat: Bad ornext processing in RewriteValve in Jira Software Data Center

CVE-2026-53404 vulnerability in Apache Tomcat affects certain versions of Atlassian Jira Software Data Center. Atlassian recommends that Jira Software Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed...

Apache Tomcat 11.0.23 RewriteValve Authentication Bypass

A proof of concept exploit for an authentication bypass vulnerability in Apache Tomcat version 11.0.23. The vulnerability exists because RewriteValve rebuilds decoded request URIs using java.net.URLDecoder, causing literal plus characters to be interpreted differently during security constraint...

OPENSUSE-SU-2026:21490-1 Security update for tomcat11

This update for tomcat11 fixes the following issues - Update to Tomcat 11.0.24 - CVE-2026-59083: Incorrect URL decoding in RewriteValve may allow security control bypass bsc1271397. - CVE-2026-59084: EncryptInterceptor requirements not clearly documented bsc1271398...

OPENSUSE-SU-2026:21486-1 Security update for tomcat

This update for tomcat fixes the following issues: Update to Tomcat 9.0.120. Security issues fixed: - CVE-2026-59083: incorrect URL decoding in RewriteValve may allow security control bypass bsc1271397. - CVE-2026-59084: EncryptInterceptor requirements are not clearly documented bsc1271398. Other...

SUSE-SU-2026:3418-1 Security update for tomcat10

This update for tomcat10 fixes the following issues: Update to Tomcat 10.1.57. Security issues fixed: - CVE-2026-59083: incorrect URL decoding in RewriteValve may allow security control bypass bsc1271397. - CVE-2026-59084: EncryptInterceptor requirements are not clearly documented bsc1271398. Oth...

BIT-TOMCAT-2026-59083 Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass

Improper Handling of URL Encoding Hex Encoding vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0 through 11.0.23, from 10.1.0 through 10.1.56, from 9.0.0 through 9.0.119, from 8.5.0 through...

Improper Handling of URL Encoding (Hex Encoding)

Overview org.apache.tomcat:tomcat-catalina is a Tomcat Servlet Engine Core Classes and Standard implementations. Affected versions of this package are vulnerable to Improper Handling of URL Encoding Hex Encoding in the RewriteValve. An attacker can bypass security constraints by crafting speciall...

Fixed in Apache Tomcat 11.0.24

Low: EncryptInterceptor requirements not clearly documented CVE-2026-59084 The requirements to securely configure the EncryptInterceptor were not clearly documented. This was fixed with commit 57e80e9b. This issue was reported to the Tomcat security team on 29 June 2026. The issue was made public...

Fixed in Apache Tomcat 10.1.57

Low: EncryptInterceptor requirements not clearly documented CVE-2026-59084 The requirements to securely configure the EncryptInterceptor were not clearly documented. This was fixed with commit 79466463. This issue was reported to the Tomcat security team on 29 June 2026. The issue was made public...

Fixed in Apache Tomcat 9.0.120

Low: EncryptInterceptor requirements not clearly documented CVE-2026-59084 The requirements to securely configure the EncryptInterceptor were not clearly documented. This was fixed with commit 617d7275. This issue was reported to the Tomcat security team on 29 June 2026. The issue was made public...

KLA91138 SB vulnerabilities in Apache Tomcat

Security bypass vulnerabilities were found in Apache Tomcat. Malicious users can exploit these vulnerabilities to bypass security restrictions. Below is a complete list of vulnerabilities: 1. Security vulnerability can be exploited to bypass security restrictions. 2. Security vulnerability in...

Always-Incorrect Control Flow Implementation

Overview org.apache.tomcat:tomcat-catalina is a Tomcat Servlet Engine Core Classes and Standard implementations. Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation due to incorrect control flow in the RewriteValve process. An attacker can bypass...

CVE-2026-53404 Apache Tomcat: Bad ornext processing in RewriteValve

Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from...

CLSA-2026-1768989206 pki-servlet-engine: Fix of CVE-2025-55752

CVE-2025-55752: fix improper normalization in RewriteValve to prevent path traversal attacks...

Improper Neutralization

Overview org.apache.tomcat.embed:tomcat-embed-core is a Core Tomcat implementation. Affected versions of this package are vulnerable to Improper Neutralization in the RewriteValve class, which handles rewrite rules. If rewrite rules are configured to enforce security constraints, those security...