What’s Vulnerable › Vulnerabilities

CVE-2024-4027: Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-30 · updated 2026-09-01
• Weakness: CWE-20

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.

Affected products

• Red Hat build of Apicurio Registry 2: all versions
• Red Hat Fuse 7: all versions
• Red Hat Integration Camel K 1: all versions
• Red Hat Process Automation 7: all versions

References

• https://access.redhat.com/security/cve/CVE-2024-4027
• https://bugzilla.redhat.com/show_bug.cgi?id=2276410
• https://access.redhat.com/security/cve/CVE-2024-4027
• https://bugzilla.redhat.com/show_bug.cgi?id=2276410
• https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4027.json

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