Allocation of Resources Without Limits or Throttling Affecting undici package, versions >=6.5.0 <6.29.1>=7.0.0 <7.30.1>=8.0.0 <8.12.2
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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- published18 Oct 2026
- disclosed15 Oct 2026
- creditSyed Mohammad Ibrahim
Introduced: 15 Oct 2026
NewCVE-2026-109924 (opens in a new tab)How to fix?
Upgrade undici to version 6.29.1, 7.30.1, 8.12.2 or higher.
Overview
undici is an An HTTP/1.1 client, written from scratch for Node.js
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the EventSourceStream transform in lib/web/eventsource/eventsource-stream.js, where the maxEventSize limit is only enforced inside parseLine(), which is only invoked when a line terminator (CR or LF) is encountered. A server can stream a data: field (or any field) that never contains a line terminator, causing the client to buffer the response body without bound and driving the process toward memory exhaustion.