{"answers":{"affected":"6 open source packages ship an affected version, including io.undertow:undertow-core.","exploited":"There is no known exploitation of CVE-2024-4027 in the wild and no public exploit code.","fix":"Upgrade io.undertow:undertow-core to a fixed version for your release line: 2.2.39.Final, 2.3.21.Final or 2.4.0.Beta1.","what":"CVE-2024-4027 is a high-severity denial of service vulnerability in Red Hat Data Grid 8, published on 30 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-4027 and fix it if it is affected.\n\nWhat it is: CVE-2024-4027 is a high-severity denial of service vulnerability in Red Hat Data Grid 8, published on 30 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-4027 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.undertow:undertow-core (Maven): affected all versions; fixed in 2.2.39.Final\n- io.undertow:undertow-core (Maven): affected all versions; fixed in 2.2.39.Final\n- io.undertow:undertow-core (Maven): affected from 2.3.0.Alpha1; fixed in 2.3.21.Final\n- io.undertow:undertow-core (Maven): affected from 2.3.0.Alpha1; fixed in 2.3.21.Final\n- io.undertow:undertow-core (Maven): affected from 2.4.0.Alpha1; fixed in 2.4.0.Beta1\n- io.undertow:undertow-core (Maven): affected from 2.4.0.Alpha1; fixed in 2.4.0.Beta1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2024-4027/ (Markdown: https://insights.sbomify.com/CVE-2024-4027/index.md)","id":"CVE-2024-4027","markdown":"https://insights.sbomify.com/CVE-2024-4027/index.md","name":"CVE-2024-4027","record":{"aliases":["CLSA-2026-1778546708","CLSA-2026-1784769562","DEBIAN-CVE-2024-4027","GHSA-33hj-rcmx-86mv","UBUNTU-CVE-2024-4027"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Undertow web server","requires_auth":"none","summary":"An attacker can cause a remote denial of service by sending requests with large parameter names, triggering an OutOfMemoryError in Undertow.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks","id":"CVE-2024-4027","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"denial_of_service","year":"2024"},"n_packages":6,"n_references":2,"next":{"headline":"Keycloak-core: stored xss in keycloak when creating a items in admin console","id":"CVE-2024-4028"},"packages":[{"ecosystem":"Maven","fixed":["2.2.39.Final"],"introduced":["0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":null,"source":"GHSA-33hj-rcmx-86mv"},{"ecosystem":"Maven","fixed":["2.2.39.Final"],"introduced":["0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","source":"GHSA-33hj-rcmx-86mv"},{"ecosystem":"Maven","fixed":["2.3.21.Final"],"introduced":["2.3.0.Alpha1"],"last_affected":[],"package":"io.undertow:undertow-core","purl":null,"source":"GHSA-33hj-rcmx-86mv"},{"ecosystem":"Maven","fixed":["2.3.21.Final"],"introduced":["2.3.0.Alpha1"],"last_affected":[],"package":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","source":"GHSA-33hj-rcmx-86mv"},{"ecosystem":"Maven","fixed":["2.4.0.Beta1"],"introduced":["2.4.0.Alpha1"],"last_affected":[],"package":"io.undertow:undertow-core","purl":null,"source":"GHSA-33hj-rcmx-86mv"},{"ecosystem":"Maven","fixed":["2.4.0.Beta1"],"introduced":["2.4.0.Alpha1"],"last_affected":[],"package":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","source":"GHSA-33hj-rcmx-86mv"}],"prev":{"headline":"Cross-Site Scripting in the Holded application","id":"CVE-2024-4026"},"products":["Red Hat Data Grid 8","Red Hat Fuse 7","Red Hat Integration Camel K 1","Red Hat JBoss Enterprise Application Platform 7","Red Hat JBoss Enterprise Application Platform 8","Red Hat JBoss Enterprise Application Platform Expansion Pack","Red Hat Process Automation 7","Red Hat Single Sign-On 7","Red Hat build of Apicurio Registry 2","Red Hat build of Quarkus"],"published":"2026-01-30","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-01","vendors":["Red Hat"]},"summary":"An attacker can cause a remote denial of service by sending requests with large parameter names, triggering an OutOfMemoryError in Undertow.","url":"https://insights.sbomify.com/CVE-2024-4027/"}