# io.undertow:undertow-core (Maven) vulnerabilities Source: https://junglewise.ai/threats/technologies/io-undertow-undertow-core Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/io-undertow-undertow-core.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 40 vulnerabilities in io.undertow:undertow-core (Maven): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-3260, was published on 24 March 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 40 (1 critical, 0 exploited in the wild) ## About io.undertow:undertow-core (Maven) A core engine for the Undertow web server providing blocking and non-blocking HTTP handlers. ## Latest io.undertow:undertow-core (Maven) vulnerabilities - [CVE-2026-3260: Red Hat Undertow resource exhaustion in HTTP request parsing](https://junglewise.ai/threats/cve-2026-3260-red-hat-undertow-resource-exhaustion-in-http-request-parsing) (medium, CVSS 5.9, published 24 Mar 2026) - [CVE-2024-4027: Red Hat Undertow denial of service via OutOfMemoryError in getParameterNames](https://junglewise.ai/threats/cve-2024-4027-red-hat-undertow-denial-of-service-via-outofmemoryerror-in) (high, CVSS 7.5, published 30 Jan 2026) - [CVE-2025-12543: Red Hat Undertow improper Host header validation](https://junglewise.ai/threats/cve-2025-12543-red-hat-undertow-improper-host-header-validation) (critical, CVSS 9.6, published 7 Jan 2026) - [CVE-2024-3884: Red Hat Undertow OutOfMemory denial of service in form parsing](https://junglewise.ai/threats/cve-2024-3884-red-hat-undertow-outofmemory-denial-of-service-in-form-parsing) (high, CVSS 7.5, published 3 Dec 2025) - [CVE-2025-9784: Red Hat Undertow denial of service via MadeYouReset attack](https://junglewise.ai/threats/cve-2025-9784-red-hat-undertow-denial-of-service-via-madeyoureset-attack) (high, CVSS 7.5, published 2 Sep 2025) - [CVE-2024-4109: Withdrawn Advisory: undertow: information leakage via HTTP/2 request header reuse](https://junglewise.ai/threats/cve-2024-4109-withdrawn-advisory-undertow-information-leakage-via-http-2-request) (low, CVSS 3.1, published 12 Dec 2024) - [CVE-2023-4639: Undertow incorrectly parses cookies](https://junglewise.ai/threats/cve-2023-4639-undertow-incorrectly-parses-cookies) (low, CVSS 3.1, published 17 Nov 2024) - [CVE-2023-1973: Undertow Denial of Service vulnerability](https://junglewise.ai/threats/cve-2023-1973-undertow-denial-of-service-vulnerability) (low, CVSS 3.1, published 7 Nov 2024) - [CVE-2024-7885: Undertow vulnerable to Race Condition](https://junglewise.ai/threats/cve-2024-7885-undertow-vulnerable-to-race-condition) (low, CVSS 3.1, published 21 Aug 2024) - [CVE-2024-3653: Undertow Missing Release of Memory after Effective Lifetime vulnerability](https://junglewise.ai/threats/cve-2024-3653-undertow-missing-release-of-memory-after-effective-lifetime) (low, CVSS 3.1, published 9 Jul 2024) - [CVE-2024-5971: Undertow Denial of Service vulnerability](https://junglewise.ai/threats/cve-2024-5971-undertow-denial-of-service-vulnerability) (low, CVSS 3.1, published 8 Jul 2024) - [CVE-2024-6162: Undertow's url-encoded request path information can be broken on ajp-listener](https://junglewise.ai/threats/cve-2024-6162-undertow-s-url-encoded-request-path-information-can-be-broken-on) (low, CVSS 3.1, published 20 Jun 2024) - [CVE-2024-1635: Undertow Uncontrolled Resource Consumption Vulnerability](https://junglewise.ai/threats/cve-2024-1635-undertow-uncontrolled-resource-consumption-vulnerability) (low, CVSS 3.1, published 20 Feb 2024) - [CVE-2024-1459: Undertow Path Traversal vulnerability](https://junglewise.ai/threats/cve-2024-1459-undertow-path-traversal-vulnerability) (low, CVSS 3.1, published 12 Feb 2024) - [CVE-2023-1108: Undertow denial of service vulnerability](https://junglewise.ai/threats/cve-2023-1108-undertow-denial-of-service-vulnerability) (low, CVSS 3.1, published 14 Sep 2023) - [CVE-2022-4492: Undertow client not checking server identity presented by server certificate in https connections](https://junglewise.ai/threats/cve-2022-4492-undertow-client-not-checking-server-identity-presented-by-server) (low, CVSS 3.1, published 23 Feb 2023) - [CVE-2022-2053: Undertow vulnerable to Dos via Large AJP request](https://junglewise.ai/threats/cve-2022-2053-undertow-vulnerable-to-dos-via-large-ajp-request) (low, CVSS 3.1, published 6 Aug 2022) - [CVE-2021-3859: Undertow vulnerable to Denial of Service (DoS) attacks](https://junglewise.ai/threats/cve-2021-3859-undertow-vulnerable-to-denial-of-service-dos-attacks) (low, CVSS 3.1, published 15 Jul 2022) - [CVE-2021-3690: Undertow vulnerable to memory exhaustion due to buffer leak](https://junglewise.ai/threats/cve-2021-3690-undertow-vulnerable-to-memory-exhaustion-due-to-buffer-leak) (low, CVSS 3.1, published 15 Jul 2022) - [CVE-2021-3629: Undertow Uncontrolled Resource Consumption](https://junglewise.ai/threats/cve-2021-3629-undertow-uncontrolled-resource-consumption) (low, CVSS 3.1, published 25 May 2022) - [CVE-2021-3597: undertow Race Condition vulnerability](https://junglewise.ai/threats/cve-2021-3597-undertow-race-condition-vulnerability) (low, CVSS 3.1, published 25 May 2022) - [CVE-2020-1745: Improper Authorization in Undertoe](https://junglewise.ai/threats/cve-2020-1745-improper-authorization-in-undertoe) (low, CVSS 3, published 24 May 2022) - [CVE-2020-1757: Improper Input Validation in Undertow](https://junglewise.ai/threats/cve-2020-1757-improper-input-validation-in-undertow) (low, CVSS 3, published 24 May 2022) - [CVE-2019-14888: Undertow vulnerable to Uncontrolled Resource Consumption](https://junglewise.ai/threats/cve-2019-14888-undertow-vulnerable-to-uncontrolled-resource-consumption) (low, CVSS 3.1, published 24 May 2022) - [CVE-2014-7816: Improper Limitation of a Pathname to a Restricted Directory in JBoss Undertow](https://junglewise.ai/threats/cve-2014-7816-improper-limitation-of-a-pathname-to-a-restricted-directory-in) (info, published 17 May 2022) ## Most severe io.undertow:undertow-core (Maven) vulnerabilities - [CVE-2025-12543: Red Hat Undertow improper Host header validation](https://junglewise.ai/threats/cve-2025-12543-red-hat-undertow-improper-host-header-validation) (critical, CVSS 9.6, published 7 Jan 2026) - [CVE-2025-9784: Red Hat Undertow denial of service via MadeYouReset attack](https://junglewise.ai/threats/cve-2025-9784-red-hat-undertow-denial-of-service-via-madeyoureset-attack) (high, CVSS 7.5, published 2 Sep 2025) - [CVE-2024-3884: Red Hat Undertow OutOfMemory denial of service in form parsing](https://junglewise.ai/threats/cve-2024-3884-red-hat-undertow-outofmemory-denial-of-service-in-form-parsing) (high, CVSS 7.5, published 3 Dec 2025) - [CVE-2024-4027: Red Hat Undertow denial of service via OutOfMemoryError in getParameterNames](https://junglewise.ai/threats/cve-2024-4027-red-hat-undertow-denial-of-service-via-outofmemoryerror-in) (high, CVSS 7.5, published 30 Jan 2026) - [CVE-2026-3260: Red Hat Undertow resource exhaustion in HTTP request parsing](https://junglewise.ai/threats/cve-2026-3260-red-hat-undertow-resource-exhaustion-in-http-request-parsing) (medium, CVSS 5.9, published 24 Mar 2026) - [CVE-2024-1635: Undertow Uncontrolled Resource Consumption Vulnerability](https://junglewise.ai/threats/cve-2024-1635-undertow-uncontrolled-resource-consumption-vulnerability) (low, CVSS 3.1, published 20 Feb 2024) - [CVE-2019-3888: Credential exposure through log files in Undertow](https://junglewise.ai/threats/cve-2019-3888-credential-exposure-through-log-files-in-undertow) (low, CVSS 3.1, published 13 Jun 2019) - [CVE-2024-5971: Undertow Denial of Service vulnerability](https://junglewise.ai/threats/cve-2024-5971-undertow-denial-of-service-vulnerability) (low, CVSS 3.1, published 8 Jul 2024) - [CVE-2024-7885: Undertow vulnerable to Race Condition](https://junglewise.ai/threats/cve-2024-7885-undertow-vulnerable-to-race-condition) (low, CVSS 3.1, published 21 Aug 2024) - [CVE-2019-14888: Undertow vulnerable to Uncontrolled Resource Consumption](https://junglewise.ai/threats/cve-2019-14888-undertow-vulnerable-to-uncontrolled-resource-consumption) (low, CVSS 3.1, published 24 May 2022) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Maven technologies - [org.jenkins-ci.main:jenkins-core (Maven)](https://junglewise.ai/threats/technologies/org-jenkins-ci-main-jenkins-core): 259 vulnerabilities - [org.apache.tomcat:tomcat (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat): 169 vulnerabilities - [com.liferay.portal:release.portal.bom (Maven)](https://junglewise.ai/threats/technologies/com-liferay-portal-release-portal-bom): 159 vulnerabilities - [com.liferay.portal:release.dxp.bom (Maven)](https://junglewise.ai/threats/technologies/com-liferay-portal-release-dxp-bom): 125 vulnerabilities - [org.keycloak:keycloak-services (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-services): 122 vulnerabilities - [com.fasterxml.jackson.core:jackson-databind (Maven)](https://junglewise.ai/threats/technologies/com-fasterxml-jackson-core-jackson-databind): 86 vulnerabilities - [org.apache.tomcat.embed:tomcat-embed-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-embed-tomcat-embed-core): 83 vulnerabilities - [org.apache.struts:struts2-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-struts-struts2-core): 60 vulnerabilities - [org.keycloak:keycloak-core (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-core): 57 vulnerabilities - [org.xwiki.platform:xwiki-platform-oldcore (Maven)](https://junglewise.ai/threats/technologies/org-xwiki-platform-xwiki-platform-oldcore): 46 vulnerabilities - [org.apache.tomcat:tomcat-catalina (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat-catalina): 44 vulnerabilities - [org.elasticsearch:elasticsearch (Maven)](https://junglewise.ai/threats/technologies/org-elasticsearch-elasticsearch): 41 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "io.undertow:undertow-core (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/io-undertow-undertow-core, 9 November 2026.