Allocation of Resources Without Limits or Throttling Affecting io.undertow:undertow-core package, versions [,2.2.39.Final)[2.3.0.Alpha1,2.3.21.Final)[2.4.0.Alpha1,2.4.0.Beta1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Jan 2026
- disclosed3 Dec 2025
- creditUnknown
Introduced: 3 Dec 2025
CVE-2024-3884 (opens in a new tab)How to fix?
Upgrade io.undertow:undertow-core to version 2.2.39.Final, 2.3.21.Final, 2.4.0.Beta1 or higher.
Overview
io.undertow:undertow-core is a Java web server based on non-blocking IO.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling when parsing multipart uploads, which apply the UndertowOptions.MULTIPART_MAX_ENTITY_SIZE option. An attacker can exhaust system memory by submitting large amounts of form data encoded with application/x-www-form-urlencoded.