Open Redirect Affecting @astrojs/internal-helpers package, versions >=0.3.0 <0.10.1
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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- published21 Jul 2026
- disclosed20 Jul 2026
- creditalanturing881
Introduced: 20 Jul 2026
NewCVE-2026-59730 (opens in a new tab)How to fix?
Upgrade @astrojs/internal-helpers to version 0.10.1 or higher.
Overview
@astrojs/internal-helpers is an Internal helpers used by core Astro packages.
Affected versions of this package are vulnerable to Open Redirect via the static file handler when the trailingSlash: 'always' configuration is enabled. An attacker can redirect users to unintended external sites by delivering a crafted link containing a backslash-prefixed path to a user.
Note: This is only exploitable if the trailingSlash: 'always' setting is enabled, the request path does not have a file extension in its final segment, and the attacker is able to deliver the crafted link to a user.
Workaround
This vulnerability can be mitigated by using the default trailingSlash: 'ignore' setting, which does not issue trailing-slash redirects in the static file handler.