Uncaught Exception Affecting undici package, versions <6.24.0>=7.0.0-alpha.1 <7.24.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Test your applications- Snyk IDSNYK-JS-UNDICI-15518070
- published13 Mar 2026
- disclosed12 Mar 2026
- creditUnknown
Introduced: 12 Mar 2026
NewCVE-2026-2229 (opens in a new tab)How to fix?
Upgrade undici to version 6.24.0, 7.24.0 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 Uncaught Exception through improper validation of the server_max_window_bits parameter in the permessage-deflate extension. An attacker can cause the process to terminate unexpectedly by sending a maliciously crafted value outside the valid range, which triggers an unhandled exception when the client attempts to create a zlib InflateRaw instance.