GHSA-w6qf-42m7-vh68 · Severity: high · Ecosystem: maven — Undertow Uncontrolled Resource Consumption Vulnerability
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 WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak.
Conclusion & alert: CVE-2024-1635 is rated Moderate Risk (63.1/100): CVSS High severity, with high exploitation likelihood (EPSS 22.69%, 96th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-07 | 23.14% | 22.69% | -0.46% |
| 2 | 2026-04-24 | 22.69% | 23.14% | +0.46% |
| 3 | 2026-04-07 | — | 22.69% | — |
Full EPSS history (52 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-w6qf-42m7-vh68 · Severity: high · Ecosystem: maven — Undertow Uncontrolled Resource Consumption Vulnerability
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2024-1635 not yet assigned priority: Debian including 1 source packages (undertow), 2 status rows across 2 suites (forky, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2024-1635 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2024-1635 |
ubuntu
|
medium | CVE-2024-1635 medium priority: Ubuntu including 1 source packages (undertow), 11 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, DNE 2, ignored 2. | https://ubuntu.com/security/CVE-2024-1635 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* |
| netapp | oncommand_workflow_automation | — | cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* |
| redhat | fuse | 1.0 | cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:* |
| redhat | integration_camel_for_spring_boot | — | cpe:2.3:a:redhat:integration_camel_for_spring_boot:-:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform | 7.4 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.11 | cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.12 | cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_linuxone | 4.9 | cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.9:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_linuxone | 4.10 | cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.10:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_power | 4.9 | cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_power | 4.10 | cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:* |
| redhat | single_sign-on | — | cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* |
| redhat | single_sign-on | 7.6 | cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:* |