CVE-2026-107718 is a medium-severity (CVSS 6.1) Open Redirect vulnerability in @adonisjs/http-server. A fix is available for @adonisjs/http-server — see the affected versions and patch details below.
AdonisJS: Unencoded route parameters can produce open redirects
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-107718.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-107718 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 394,803 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
@adonisjs/http-servernpmDescription
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:
router.get('/:page', handler).as('pages.show')
response.redirect().toRoute('pages.show', {
page: '/evil.example.com',
})
This generates the following redirect:
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:
if (isDefined) {
uriSegments.push(`${value}${token.end}`)
}
Wildcard parameters had the same behavior:
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:
if (isDefined) {
uriSegments.push(`${encodeURIComponent(String(value))}${token.end}`)
}
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @adonisjs/http-server | ≥ 9.0.0&&< 9.3.0 | 9.3.0npm install @adonisjs/http-server@9.3.0 |
| 📦npm | @adonisjs/http-server | all versions | 8.2.3npm install @adonisjs/http-server@8.2.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @adonisjs/http-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update @adonisjs/http-server to 9.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-107718 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.
Frequently Asked Questions
Is CVE-2026-107718 in your dependencies?
Find it across npm, including transitive dependencies.