CRLF Injection Affecting undici package, versions <6.24.0>=7.0.0-alpha.1 <7.24.0
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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Test your applications- Snyk IDSNYK-JS-UNDICI-15518072
- published13 Mar 2026
- disclosed12 Mar 2026
- creditUnknown
Introduced: 12 Mar 2026
NewCVE-2026-1527 (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 CRLF Injection via the upgrade option of the client.request() function. An attacker can inject malicious data into HTTP headers or prematurely terminate HTTP requests by sending specially crafted input, potentially leading to unauthorized information disclosure or bypassing of security controls.