Fixed in Apache Tomcat 5.5.1

Low: Information disclosure CVE-2008-3271 Bug 25835 can, in rare circumstances - this has only been reproduced using a debugger to force a particular processing sequence for two threads - allow a user from a non-permitted IP address to gain access to a context that is protected with a valve that...

Fixed in Apache Tomcat 11.0.0-M6

Important: Information disclosure CVE-2023-34981 The fix for bug 66512 introduced a regression that was fixed as bug 66591. The regression meant that, if a response did not have any HTTP headers set, no AJP SENDHEADERS message would be sent which in turn meant that at least one AJP based proxy...

Fixed in Apache Tomcat JK Connector 1.2.49

Important: Information disclosure CVE-2023-41081 In some circumstances, such as when a configuration included JkOptions +ForwardDirectories but the configuration did not provide explicit mounts for all possible proxied requests, modjk would use an implicit mapping and map the request to the first...

Fixed in Apache Tomcat Native Connector 1.2.16

Note: The issue below was fixed in Apache Tomcat Native Connector 1.2.15 but the release vote for the 1.2.15 release candidate did not pass. Therefore, although users must download 1.2.16 to obtain a version that includes the fix for this issue, version 1.2.15 is not included in the list of...

Fixed in Apache Tomcat JK Connector 1.2.41

Important: Information disclosure CVE-2014-8111 Multiple adjacent slashes in a request URI were not collapsed to a single slash before comparing the request URI to the configured mount and unmount patterns. It is therefore possible for an attacker to use a request URI containing multiple adjacent...

Fixed in Apache Tomcat 11.0.3

Important: Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet - CVE-2025-24813 The original implementation of partial PUT used a temporary file based on the user provided file name and path with the path separator...

Fixed in Apache Tomcat JK Connector 1.2.16

Important: Information disclosure CVE-2006-7197 The Tomcat AJP connector contained a bug that sometimes set a too long length for the chunks delivered by sendbodychunks AJP messages. Bugs of this type can cause modjk to read beyond buffer boundaries and thus reveal sensitive memory information to...

Fixed in Apache Tomcat 11.0.22

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 commits 276087d9 and 06597486. This issue was reported to the...

Fixed in Apache Tomcat 11.0.6

Low: Rewrite rule bypass CVE-2025-31651 For a subset of unlikely rewrite rule configurations, it was possible for a specially crafted request to bypass some rewrite rules. If those rewrite rules effectively enforced security constraints, those constraints could be bypassed. This was fixed with...

Fixed in Apache Tomcat 11.0.7

Low: CGI security constraint bypass CVE-2025-46701 When running on a case insensitive file system with security constraints configured for the pathInfo component of a URL that mapped to the CGI servlet, it was possible to bypass those security constraints with a specially crafted URL. This was...

Fixed in Apache Tomcat 11.0.23

Moderate: Security constraints for default servlet ignored method CVE-2026-55956 If security constraints were specified for the default servlet, any method or method omission configured as part of the constraint was ignored. This was fixed with commit 3f6bd2ba. This issue was reported to the Tomc...

Fixed in Apache Tomcat Native Connector 2.0.14 / 1.3.7

Moderate: OCSP checks sometimes soft-fail even when soft-fail is disabled CVE-2026-29145 CLIENTCERT authentication did not fail OCSP checks as expected for some scenarios when soft fail was disabled. This was fixed with commit bcea0ac2 2.0.x and 204f7f8a 1.3.x. This issue was reported to the Tomc...

Fixed in Apache Tomcat 11.0.8

Moderate: Session fixation possible via rewrite valve CVE-2025-55668 If the rewrite valve was enabled for a web application, an attacker was able to craft a URL that, if a victim clicked on it, would cause the victim's interaction with that resource to occur in the context of the attacker's...

Fixed in Apache Tomcat 10.1.45

Low: Console manipulation via escape sequences in log messages CVE-2025-55754 Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape sequences, it was possible for an attacker to use a...

Fixed in Apache Tomcat 11.0.9

Low: DoS due to overflow in file upload limit CVE-2025-52520 For some unlikely configurations of multipart upload, an Integer Overflow vulnerability could lead to a DoS via bypassing of size limits. This was fixed with commit a51e4bed. This issue was reported to the Tomcat security team on 7 June...

Fixed in Apache Tomcat 9.0.117

Moderate: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled CVE-2026-34500 CLIENTCERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used. This was fixed with commit ff589ab2. This issue was reported to the Tomcat security...

Fixed in Apache Tomcat 9.0.113

Low: Security constraint bypass CVE-2026-24733 Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a specification invalid HEAD...

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 11.0.21

Moderate: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled CVE-2026-34500 CLIENTCERT authentication did not fail as expected for some scenarios when soft fail was disabled and FFM was used. This was fixed with commit c13e60e7. This issue was reported to the Tomcat security...

Fixed in Apache Tomcat 11.0.20

Moderate: The fix forCVE-2025-66614 was incomplete CVE-2026-32990 The validation of SNI name and host name did not take account of possible differences in case allowing the strict SNI checks to be bypassed. This was fixed with commit 021d1f83. This issue was reported to the Tomcat security team o...

Fixed in Apache Tomcat 10.1.41

Low: CGI security constraint bypass CVE-2025-46701 When running on a case insensitive file system with security constraints configured for the pathInfo component of a URL that mapped to the CGI servlet, it was possible to bypass those security constraints with a specially crafted URL. This was...

Fixed in Apache Tomcat 10.1.50

Low: Security constraint bypass CVE-2026-24733 Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a specification invalid HEAD...

Fixed in Apache Tomcat 9.0.121

Low: Authenticated WebSocket session survives end of HTTP session CVE-2026-73180 If the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the...

Fixed in Apache Tomcat 11.0.25

Low: Authenticated WebSocket session survives end of HTTP session CVE-2026-73180 If the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the...

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...

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 9.0.119

Moderate: Security constraints for default servlet ignored method CVE-2026-55956 If security constraints were specified for the default servlet, any method or method omission configured as part of the constraint was ignored. This was fixed with commit a0374c45. This issue was reported to the Tomc...

Fixed in Apache Tomcat 9.0.116

Moderate: The fix forCVE-2025-66614 was incomplete CVE-2026-32990 The validation of SNI name and host name did not take account of possible differences in case allowing the strict SNI checks to be bypassed. This was fixed with commit 95f77782. This issue was reported to the Tomcat security team o...

Fixed in Apache Tomcat 10.1.44

Important: DoS in HTTP/2 due to client triggered stream reset CVE-2025-48989 Tomcat's HTTP/2 implementation was vulnerable to the made you reset attack. The denial of service typically manifested as an OutOfMemoryError. This was fixed with commit 73c04a10. This issue was reported to the ASF...

Fixed in Apache Tomcat 11.0.10

Important: DoS in HTTP/2 due to client triggered stream reset CVE-2025-48989 Tomcat's HTTP/2 implementation was vulnerable to the made you reset attack. The denial of service typically manifested as an OutOfMemoryError. This was fixed with commit f362c8eb. This issue was reported to the ASF...

Fixed in Apache Tomcat 10.1.55

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 c6213173. This issue was reported to the Tomcat securit...

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...

Fixed in Apache Tomcat 10.1.52

Moderate: Incomplete OCSP verification checks CVE-2026-24734 When using an OCSP responder, Tomcat's FFM integration with OpenSSL did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. Affects: 10.1.0-M7 to 10.1.51 This issue...

Fixed in Apache Tomcat 10.1.47

Low: Delayed cleaning of multipart upload temporary files may lead to DoS CVE-2025-61795 If an error occurred including exceeding limits during the processing of a multipart upload, temporary copies of the uploaded parts written to local storage were not cleaned up immediately but left for the...

Fixed in Apache Tomcat 11.0.11

Low: Console manipulation via escape sequences in log messages CVE-2025-55754 Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape sequences, it was possible for an attacker to use a...

Fixed in Apache Tomcat 9.0.108

Important: DoS in HTTP/2 due to client triggered stream reset CVE-2025-48989 Tomcat's HTTP/2 implementation was vulnerable to the made you reset attack. The denial of service typically manifested as an OutOfMemoryError. This was fixed with commit f36b8a4e. This issue was reported to the ASF...

Fixed in Apache Tomcat 10.1.53

Moderate: The fix forCVE-2025-66614 was incomplete CVE-2026-32990 The validation of SNI name and host name did not take account of possible differences in case allowing the strict SNI checks to be bypassed. This was fixed with commit 4d0615a5. This issue was reported to the Tomcat security team o...

Fixed in Apache Tomcat 9.0.109

Low: Console manipulation via escape sequences in log messages CVE-2025-55754 Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape sequences, it was possible for an attacker to use a...

Fixed in Apache Tomcat 9.0.102

Important: Authentication bypass with JNDIRealm and GSSAPI authenticated bind CVE-2026-55957 When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker was able authenticate without providing the correct password. This was fixed with commits c32bbd37. This issue was reporte...

Fixed in Apache Tomcat 10.1.58

Low: DoS in WebSocket chat example CVE-2026-66299 The WebSocket chat example provided an unbounded buffer for undelivered messages. A maliciously slow client could cause the buffer to grow continuously, eventually leading to an memory exhaustion and failure of the Tomcat process. This was fixed...

Fixed in Apache Tomcat 10.1.56

Moderate: Security constraints for default servlet ignored method CVE-2026-55956 If security constraints were specified for the default servlet, any method or method omission configured as part of the constraint was ignored. This was fixed with commit 9c3b1efb. This issue was reported to the Tomc...

Fixed in Apache Tomcat 11.0.18

Moderate: Incomplete OCSP verification checks CVE-2026-24734 When using an OCSP responder, Tomcat's FFM integration with OpenSSL did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. Affects: 11.0.0-M1 to 11.0.17 This issue...

Fixed in Apache Tomcat 9.0.115

Moderate: Incomplete OCSP verification checks CVE-2026-24734 When using an OCSP responder, Tomcat's FFM integration with OpenSSL did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. Affects: 9.0.83 to 9.0.114 This issue wa...

Fixed in Apache Tomcat 10.1.43

Low: DoS due to overflow in file upload limit CVE-2025-52520 For some unlikely configurations of multipart upload, an Integer Overflow vulnerability could lead to a DoS via bypassing of size limits. This was fixed with commit fc42bbcc. This issue was reported to the Tomcat security team on 7 June...

Fixed in Apache Tomcat 10.1.59

Note: The issues below were fixed in Apache Tomcat 10.1.58 but the release vote for the 10.1.58 release candidate did not pass. Therefore, although users must download 10.1.59 to obtain a version that includes a fix for these issues, version 10.1.58 is not included in the list of affected version...

Fixed in Apache Tomcat 10.1.54

Moderate: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled CVE-2026-34500 CLIENTCERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used. This was fixed with commit 29b56a56. This issue was reported to the Tomcat security...

Fixed in Apache Tomcat Native Connector 2.0.12 / 1.3.5

Moderate: Incomplete OCSP verification checks CVE-2026-24734 When using an OCSP responder, Tomcat Native did complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue was reported to the Tomcat security team on 2 November...

Fixed in Apache Tomcat 11.0.15

Low: Security constraint bypass CVE-2026-24733 Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a specification invalid HEAD...

Fixed in Apache Tomcat 10.1.39

Important: Authentication bypass with JNDIRealm and GSSAPI authenticated bind CVE-2026-55957 When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker was able authenticate without providing the correct password. This was fixed with commits 0cd21c03. This issue was reporte...

Fixed in Apache Tomcat 11.0.26

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 4fef25fe. This issue was reported to the Tomcat security team on 7 September 2026. The iss...