Open Redirect Affecting nitropack package, versions <2.13.4
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-NITROPACK-16757946
- published19 May 2026
- disclosed6 May 2026
- credit0x0OZ
Introduced: 6 May 2026
NewCVE-2026-44372 (opens in a new tab)How to fix?
Upgrade nitropack to version 2.13.4 or higher.
Overview
nitropack is a Build and Deploy Universal JavaScript Servers
Affected versions of this package are vulnerable to Open Redirect via the routeRules function. An attacker can redirect users to arbitrary external sites by crafting URLs with double slashes after the route prefix, causing browsers to interpret the redirect as a protocol-relative URL. This is only exploitable if the project uses routeRules with a redirect entry that includes a wildcard suffix (such as /**), and the redirect is not handled natively at the CDN layer (e.g., not using the vercel, netlify, cloudflare-pages, or edgeone presets).