Redhat Undertow vulnerabilities

CVE-2014-7816 [MEDIUM] CWE-22 CVE-2014-7816: Directory traversal vulnerability in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and Directory traversal vulnerability in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and 1.2.x before 1.2.0.Beta3, when running on Windows, allows remote attackers to read arbitrary files via a .. (dot dot) in a resource URI.

CVE-2020-1745 [CRITICAL] CWE-285 CVE-2020-1745: A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configurati A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.29.Final and before and was fixed in 2.0.30.Final. A remote, unauthenticated attacker could exploit this vulnerability to read web application files from a vulnerable server. In instances where the vulnerable se

CVE-2025-12543 [CRITICAL] CWE-20 CVE-2025-12543: A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Ja A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perf

CVE-2019-3888 [CRITICAL] CWE-532 CVE-2019-3888: A vulnerability was found in Undertow web server before 2.0.21. An information exposure of plain tex A vulnerability was found in Undertow web server before 2.0.21. An information exposure of plain text credentials through log files because Connectors.executeRootHandler:402 logs the HttpServerExchange object at ERROR level using UndertowLogger.REQUEST_LOGGER.undertowRequestFailed(t, exchange)

CVE-2019-10212 [CRITICAL] CWE-532 CVE-2019-10212: A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security. I A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security. If enabled, an attacker could abuse this flaw to obtain the user's credentials from the log files.

CVE-2023-4639 [HIGH] CVE-2023-4639: A flaw was found in Undertow, which incorrectly parses cookies with certain value-delimiting characters in incoming requests A flaw was found in Undertow, which incorrectly parses cookies with certain value-delimiting characters in incoming requests. This issue could allow an attacker to construct a cookie value to exfiltrate HttpOnly cookie values or spoof arbitrary additional cookie values, leading to unauthorized data access or modification. The main threat

CVE-2025-9784 [HIGH] CVE-2025-9784: A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this hi

CVE-2020-1757 [HIGH] CWE-20 CVE-2020-1757: A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x A flaw was found in all undertow-2.x.x SP1 versions prior to undertow-2.0.30.SP1, all undertow-1.x.x and undertow-2.x.x versions prior to undertow-2.1.0.Final, where the Servlet container causes servletPath to normalize incorrectly by truncating the path after semicolon which may lead to an application mapping resulting in the security bypass.

CVE-2024-1635 [HIGH] CVE-2024-1635: A vulnerability was found in Undertow A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available. At HTTP upgrade to remoting, the WriteTime

CVE-2019-10184 [HIGH] CWE-862 CVE-2019-10184: undertow before version 2.0.23.Final is vulnerable to an information leak issue. Web apps may have t undertow before version 2.0.23.Final is vulnerable to an information leak issue. Web apps may have their directory structures predicted through requests without trailing slashes via the api.

CVE-2024-7885 [HIGH] CVE-2024-7885: A vulnerability was found in Undertow where the ProxyProtocolReadListener reuses the same StringBuilder instance across multiple requests A vulnerability was found in Undertow where the ProxyProtocolReadListener reuses the same StringBuilder instance across multiple requests. This issue occurs when the parseProxyProtocolV1 method processes multiple requests on the same HTTP connection. As a result, different requests may share the same StringBuilder instance,

CVE-2024-5971 [HIGH] CVE-2024-5971: A vulnerability was found in Undertow, where the chunked response hangs after the body was flushed A vulnerability was found in Undertow, where the chunked response hangs after the body was flushed. The response headers and body were sent but the client would continue waiting as Undertow does not send the expected 0\r\n termination of the chunked response. This results in uncontrolled resource consumption, leaving the server side to a denial of service attack.

CVE-2023-3223 [HIGH] CWE-789 CVE-2023-3223: A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to nu

CVE-2022-2053 [HIGH] CWE-400 CVE-2022-2053: When a POST request comes through AJP and the request exceeds the max-post-size limit (maxEntitySize When a POST request comes through AJP and the request exceeds the max-post-size limit (maxEntitySize), Undertow's AjpServerRequestConduit implementation closes a connection without sending any response to the client/proxy. This behavior results in that a front-end proxy marking the backend worker (application server) as an error state and not forward re

CVE-2023-1108 [HIGH] CWE-835 CVE-2023-1108: A flaw was found in undertow. This issue makes achieving a denial of service possible due to an unex A flaw was found in undertow. This issue makes achieving a denial of service possible due to an unexpected handshake status updated in SslConduit, where the loop never terminates.

CVE-2023-1973 [HIGH] CVE-2023-1973: A flaw was found in Undertow package A flaw was found in Undertow package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server's memory.

CVE-2023-5379 [HIGH] CVE-2023-5379: A flaw was found in Undertow A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request witho

CVE-2017-12165 [HIGH] CWE-444 CVE-2017-12165: It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with It was discovered that Undertow before 1.4.17, 1.3.31 and 2.0.0 processes http request headers with unusual whitespaces which can cause possible http request smuggling.

CVE-2018-1048 [HIGH] CVE-2018-1048: It was found that the AJP connector in undertow, as shipped in Jboss EAP 7 It was found that the AJP connector in undertow, as shipped in Jboss EAP 7.1.0.GA, does not use the ALLOW_ENCODED_SLASH option and thus allow the the slash / anti-slash characters encoded in the url which may lead to path traversal and result in the information disclosure of arbitrary local files.

CVE-2020-27782 [HIGH] CWE-400 CVE-2020-27782: A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes coul A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability. This affects Undertow 2.1.5.SP1, 2.0.33.SP2, and 2.2.3.SP1.