CVE-2024-3653: A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, le...

Description

A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, leaving the maxAge config in the handler unconfigured. The default is -1, which makes the handler vulnerable. If someone overwrites that config, the server is not subject to the attack. The attacker needs to be able to reach the server with a normal HTTP request.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

1.87%

76.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

References

Timeline

Published: Jul 8, 2024
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2024-3653?

A vulnerability was found in Undertow. This issue requires enabling the learning-push handler in the server's config, which is disabled by default, leaving the maxAge config in the handler unconfigured. The default is -1, which makes the handler vulnerable. If someone overwrites that config, the server is not subject to the attack. The attacker needs to be able to reach the server with a normal HTTP request.

How severe is CVE-2024-3653?

CVE-2024-3653 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.87% probability of exploitation in the next 30 days.

How do I fix CVE-2024-3653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.