PT-2026-108618 · Npm · @Adonisjs/Http-Server

Published

2026-10-08

·

Updated

2026-10-08

CVSS v3.1

6.1

Medium

VectorAV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Route parameters are inserted into generated URLs without URI encoding.
When an application passes untrusted input to a route whose first path segment is dynamic, a value beginning with / can produce a scheme-relative URL. For example:
ts
router.get('/:page', handler).as('pages.show')

response.redirect().toRoute('pages.show', {
 page: '/evil.example.com',
})
This generates the following redirect:
http
Location: //evil.example.com
Browsers interpret this value as an external URL and redirect the user to https://evil.example.com.

Details

The shared createURL() helper is used by route URL builders, including Router.makeUrl() and Response.redirect().toRoute().
Route parameter values were appended without encoding:
ts
if (isDefined) {
 uriSegments.push(`${value}${token.end}`)
}
Wildcard parameters had the same behavior:
ts
uriSegments.push(`${values.join('/')}${token.end}`)
The issue does not affect APIs that intentionally accept complete redirect URLs. Exploitation requires an application to pass attacker-controlled data as a route parameter and use the generated URL as a redirect destination.

Impact

An attacker may craft a link on a trusted application domain that redirects a victim to an attacker-controlled website.
This can facilitate phishing and may be chained with authentication or OAuth flows that rely on trusted redirect destinations.
Applications are affected when they:
  • define a route whose first path segment is dynamic; and
  • pass request-derived data to that segment when generating a redirect URL.

Patches

Route parameter values are now encoded using encodeURIComponent.
Wildcard values are encoded individually before being joined with /, preserving their intended segment separators:
ts
if (isDefined) {
 uriSegments.push(`${encodeURIComponent(String(value))}${token.end}`)
}
ts
uriSegments.push(
 `${values.map((value) => encodeURIComponent(String(value))).join('/')}${token.end}`
)
With the fix, /evil.example.com becomes:
/%2Fevil.example.com
Fixes targeting v6 and v7 have been published below.

Fix

Open Redirect

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Weakness Enumeration

CWE-601

Related Identifiers

GHSA-2M6Q-8V3H-JQWW

Affected Products

@Adonisjs/Http-Server