Allocation of Resources Without Limits or Throttling Affecting io.undertow:undertow-core package, versions [,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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- published29 Mar 2026
- disclosed24 Mar 2026
- creditUnknown
Introduced: 24 Mar 2026
CVE-2026-3260 (opens in a new tab)How to fix?
Upgrade io.undertow:undertow-core to version 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 via the MultiPartParserDefinition multipart parsing process in MultiPartParserDefinition.java. An attacker can cause multipart/form-data content from an HTTP GET request to be parsed and prematurely written to disk by sending a request that triggers parameter parsing, such as getParameterMap(), leading to resource exhaustion or unwanted persistence of attacker-controlled data.
Notes
- The issue manifests when an application built on Undertow invokes parameter-parsing methods on a
GETrequest while multipart/form-data content is present.