Fixed in Apache Tomcat 8.5.50

Low: Session fixation CVE-2019-17563 When using FORM authentication there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a securit...

Fixed in Apache Tomcat 9.0.90

Important: Denial of Service CVE-2024-34750 When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain...

Fixed in Apache Tomcat 8.5.60

Important: Information disclosure CVE-2021-24122 When serving resources from a network location using the NTFS file system it was possible to bypass security constraints and/or view the source code for JSPs in some configurations. The root cause was the unexpected behaviour of the JRE API...

Fixed in Apache Tomcat 9.0.0.M19

Important: Information Disclosure CVE-2017-5651 The refactoring of the HTTP connectors for 8.5.x onwards, introduced a regression in the send file processing. If the send file processing completed quickly, it was possible for the Processor to be added to the processor cache twice. This could resu...

Fixed in Apache Tomcat 5.5.26

Low: Session hi-jacking CVE-2007-5333 The previous fix for CVE-2007-3385 was incomplete. It did not consider the use of quotes or %5C within a cookie value. Affects: 5.5.0-5.5.25 Low: Elevated privileges CVE-2007-5342 The JULI logging component allows web applications to provide their own logging...

Fixed in Apache Tomcat 11.0.0-M12

Important: Request smuggling CVE-2023-45648 Tomcat did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. This was fixe...

Fixed in Apache Tomcat 9.0.48

Note: The issue below was fixed in Apache Tomcat 9.0.47 but the release vote for the 9.0.47 release candidate did not pass. Therefore, although users must download 9.0.48 to obtain a version that includes a fix for this issue, version 9.0.47 is not included in the list of affected versions...

Fixed in Apache Tomcat 9.0.44

Important: Denial of Service CVE-2021-41079 When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service. This was fixed with commit d4b340fa. This issue was first reported to the Apach...

Fixed in Apache Tomcat 8.5.63

Note: The issues below were fixed in Apache Tomcat 8.5.62 but the release vote for the 8.5.62 release candidate did not pass. Therefore, although users must download 8.5.63 to obtain a version that includes a fix for these issues, version 8.5.62 is not included in the list of affected versions...

Fixed in Apache Tomcat 10.0.0-M7

Important: WebSocket DoS CVE-2020-13935 The payload length in a WebSocket frame was not correctly validated. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service. This was fixed with commit 1c1c77b0. This issue wa...

Fixed in Apache Tomcat 8.5.5 and 8.0.37

Low: Unrestricted Access to Global Resources CVE-2016-6797 The ResourceLinkFactory did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether...

Fixed in Apache Tomcat 7.0.59

Note: The issue below was fixed in Apache Tomcat 7.0.58 but the release vote for the 7.0.58 release candidate did not pass. Therefore, although users must download 7.0.59 to obtain a version that includes a fix for this issue, versions 7.0.58 is not included in the list of affected versions...

Fixed in Apache Tomcat 4.1.37

Important: Information disclosure CVE-2005-3164 If a client specifies a Content-Length but disconnects before sending any of the request body, the deprecated AJP connector processes the request using the request body of the previous request. Users are advised to use the default, supported Coyote...

Fixed in Apache Tomcat 7.0.81

Important: Information Disclosure CVE-2017-12616 When using a VirtualDirContext it was possible to bypass security constraints and/or view the source code of JSPs for resources served by the VirtualDirContext using a specially crafted request. This was fixed in revision 1804729. This issue was...

Fixed in Apache Tomcat 7.0.77

Important: Information Disclosure CVE-2017-5647 A bug in the handling of the pipelined requests when send file was used resulted in the pipelined request being lost when send file processing of the previous request completed. This could result in responses appearing to be sent for the wrong...

Fixed in Apache Tomcat 6.0.47

Note: The issues below were fixed in Apache Tomcat 6.0.46 but the release vote for the 6.0.46 release candidate did not pass. Therefore, although users must download 6.0.47 to obtain a version that includes fixes for these issues, version 6.0.46 is not included in the list of affected versions...

Fixed in Apache Tomcat 10.1.8

Moderate: Apache Tomcat denial of service CVE-2023-28709 The fix for CVE-2023-24998 was incomplete. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount...

Fixed in Apache Tomcat 8.5.64

Important: Denial of Service CVE-2021-41079 When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service. This was fixed with commit b90d4fc1. This issue was first reported to the Apach...

Fixed in Apache Tomcat 6.0.45

Low: Limited directory traversal CVE-2015-5174 This issue only affects users running untrusted web applications under a security manager. When accessing resources via the ServletContext methods getResource getResourceAsStream and getResourcePaths the paths should be limited to the current web...

Fixed in Apache Tomcat 6.0.28

Important: Remote Denial Of Service and Information Disclosure Vulnerability CVE-2010-2227 Several flaws in the handling of the 'Transfer-Encoding' header were found that prevented the recycling of a buffer. A remote attacker could trigger this flaw which would cause subsequent requests to fail...

Fixed in Apache Tomcat 5.5.27

Low: Cross-site scripting CVE-2008-1232 The message argument of HttpServletResponse.sendError call is not only displayed on the error page, but is also used for the reason-phrase of HTTP response. This may include characters that are illegal in HTTP headers. It is possible for a specially crafted...

Fixed in Apache Tomcat 4.1.32

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 9.0.36

Important: HTTP/2 DoS CVE-2020-11996 A specially crafted sequence of HTTP/2 requests could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive. This was fixed with commit 9a023168. Thi...

Fixed in Apache Tomcat 7.0.78

Important: Security Constraint Bypass CVE-2017-5664 The error page mechanism of the Java Servlet Specification requires that, when an error occurs and an error page is configured for the error that occurred, the original request and response are forwarded to the error page. This means that the...

Fixed in Apache Tomcat 9.0.0.M3

Moderate: Security Manager bypass CVE-2016-0763 This issue only affects users running untrusted web applications under a security manager. ResourceLinkFactory.setGlobalContext is a public method and was accessible to web applications even when running under a security manager. This allowed a...

Fixed in Apache Tomcat 6.0.20

Note: These issues were fixed in Apache Tomcat 6.0.19 but the release vote for that release candidate did not pass. Therefore, although users must download 6.0.20 to obtain a version that includes fixes for these issues, 6.0.19 is not included in the list of affected versions. Important:...

Fixed in Apache Tomcat 7.0.107

Important: Information disclosure CVE-2021-24122 When serving resources from a network location using the NTFS file system it was possible to bypass security constraints and/or view the source code for JSPs in some configurations. The root cause was the unexpected behaviour of the JRE API...

Fixed in Apache Tomcat 8.0.52

Important: A bug in the UTF-8 decoder can lead to DoS CVE-2018-1336 An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. This was fixed in revision 1830375. This issue was reported publicly on 6...

Fixed in Apache Tomcat 5.5.25, 5.0.SVN

Low: Cross-site scripting CVE-2007-2449 JSPs within the examples web application did not escape user provided data before including it in the output. This enabled a XSS attack. These JSPs now filter the data before use. This issue may be mitigated by undeploying the examples web application. Note...

Fixed in Apache Tomcat 8.5.16

Important: Security Constraint Bypass CVE-2017-7675 The HTTP/2 implementation bypassed a number of security checks that prevented directory traversal attacks. It was therefore possible to bypass security constraints using an specially crafted URL. This was fixed in revision 1796091. The issue was...

Fixed in Apache Tomcat 7.0.72

Note: The issues below were fixed in Apache Tomcat 7.0.71 but the release vote for the 7.0.71 release candidate did not pass. Therefore, although users must download 7.0.72 to obtain a version that includes fixes for these issues, version 7.0.71 is not included in the list of affected versions...

Fixed in Apache Tomcat 9.0.106

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 9.0.83

Important: Request smuggling CVE-2023-46589 Tomcat did not correctly parse HTTP trailer headers. A specially crafted trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a...

Fixed in Apache Tomcat 8.5.56

Important: HTTP/2 DoS CVE-2020-11996 A specially crafted sequence of HTTP/2 requests could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive. This was fixed with commit c8acd2ab. Thi...

Fixed in Apache Tomcat 8.0.43

Important: Information Disclosure CVE-2017-5647 A bug in the handling of the pipelined requests when send file was used resulted in the pipelined request being lost when send file processing of the previous request completed. This could result in responses appearing to be sent for the wrong...

Fixed in Apache Tomcat 10.0.21

Low: Apache Tomcat EncryptInterceptor DoS CVE-2022-29885 The documentation for the EncryptInterceptor incorrectly stated it enabled Tomcat clustering to run over an untrusted network. This was not correct. While the EncryptInterceptor does provide confidentiality and integrity protection, it does...

Fixed in Apache Tomcat 8.5.41

Important: Denial of Service CVE-2019-10072 The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write. By not sending WINDOWUPDATE messages for the connection window stream 0 clients were able to cause server-side threads to block eventually leading...

Fixed in Apache Tomcat 8.5.24

Low: Incorrectly documented CGI search algorithm CVE-2017-15706 As part of the fix for bug 61201, the description of the search algorithm used by the CGI Servlet to identify which script to execute was updated. The update was not correct. As a result, some scripts may have failed to execute as...

Fixed in Apache Tomcat 8.0.44

Important: Security Constraint Bypass CVE-2017-5664 The error page mechanism of the Java Servlet Specification requires that, when an error occurs and an error page is configured for the error that occurred, the original request and response are forwarded to the error page. This means that the...

Fixed in Apache Tomcat 9.0.0.M15

Note: The issue below was fixed in Apache Tomcat 9.0.0.M14 but the release vote for the 9.0.0.M14 release candidate did not pass. Therefore, although users must download 9.0.0.M15 to obtain a version that includes the fix for this issue, version 9.0.0.M14 is not included in the list of affected...

Fixed in Apache Tomcat 8.5.58

Moderate: HTTP/2 request mix-up CVE-2020-13943 If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection in violation of the HTTP/2 protocol, it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo...

Fixed in Apache Tomcat 10.0.0-M5

Important: Remote Code Execution via session persistence CVE-2020-9484 If: an attacker is able to control the contents and name of a file on the server; and the server is configured to use the PersistenceManager with a FileStore; and the PersistenceManager is configured with...

Fixed in Apache Tomcat 5.5.17, 5.0.SVN

Important: Information disclosure CVE-2007-1858 The default SSL configuration permitted the use of insecure cipher suites including the anonymous cipher suite. The default configuration no longer permits the use of insecure cipher suites. Affects: 5.0.0-5.0.30, 5.5.0-5.5.16...

Fixed in Apache Tomcat 8.5.55

Important: Remote Code Execution via session persistence CVE-2020-9484 If: an attacker is able to control the contents and name of a file on the server; and the server is configured to use the PersistenceManager with a FileStore; and the PersistenceManager is configured with...

Fixed in Apache Tomcat 9.0.2

Low: Incorrectly documented CGI search algorithm CVE-2017-15706 As part of the fix for bug 61201, the description of the search algorithm used by the CGI Servlet to identify which script to execute was updated. The update was not correct. As a result, some scripts may have failed to execute as...

Fixed in Apache Tomcat 9.0.0.M10

Low: Unrestricted Access to Global Resources CVE-2016-6797 The ResourceLinkFactory did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether...

Fixed in Apache Tomcat 7.0.68

Low: Directory disclosure CVE-2015-5345 When accessing a directory protected by a security constraint with a URL that did not end in a slash, Tomcat would redirect to the URL with the trailing slash thereby confirming the presence of the directory before processing the security constraint. It was...

Fixed in Apache Tomcat 7.0.55

Important: Request Smuggling CVE-2014-0227 It was possible to craft a malformed chunk as part of a chunked request that caused Tomcat to read part of the request body as a new request. This was fixed in revision 1601333. This issue was identified by the Tomcat security team on 30 May 2014 and mad...

Fixed in Apache Tomcat 6.0.9

Moderate: Session hi-jacking CVE-2008-0128 When using the SingleSignOn Valve via https the Cookie JSESSIONIDSSO is transmitted without the "secure" attribute, resulting in it being transmitted to any content that is - by purpose or error - requested via http from the same server. Affects:...

Fixed in Apache Tomcat 9.0.104

Note: The issues below were fixed in Apache Tomcat 9.0.103 but the release vote for the 9.0.103 release candidate did not pass. Therefore, although users must download 9.0.104 to obtain a version that includes a fix for these issues, version 9.0.103 is not included in the list of affected version...