Is CVE-2026-40255 actively exploited?

No active exploitation of CVE-2026-40255 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40255 be exploited remotely?

Yes. CVE-2026-40255 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40255?

CVE-2026-40255 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2026-40255

MEDIUM

CVE-2026-40255

CWE-601Published: April 16, 2026· Updated: Apr 17, 2026

6.1

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.0th

Official Description

AdonisJS HTTP Server is a package for handling HTTP requests in the AdonisJS framework. In @adonisjs/http-server versions prior to 7.8.1 and 8.0.0-next.0 through 8.1.3, and @adonisjs/core versions prior to 7.4.0, the response.redirect().back() method reads the Referer header from the incoming HTTP request and redirects to that URL without validating the host.An attacker who can influence the Referer header can cause the application to redirect users to a malicious external site. This affects all AdonisJS applications that use response.redirect().back() or response.redirect('back'). This issue has been fixed in versions 7.8.1 and 8.2.0 and 7.4.0 of @adonisjs/core.

NVD Source

Technical Analysis

CVE-2026-40255 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.