CVE-2026-100883: Krayin Laravel CRM Auth Bypass Vulnerability

CVE-2026-100883 Overview

CVE-2026-100883 is a broken access control vulnerability in Krayin laravel-crm versions up to 2.2.5. The flaw resides in packages/Webkul/Admin/src/Config/acl.php, where improper function-level authorization allows authenticated users to reach administrative routes that should be restricted. An attacker with low privileges can send crafted requests over the network to invoke protected functionality. The exploit has been published publicly, raising the risk of opportunistic use against unpatched deployments. The vendor fixed the issue in version 2.2.6 via commit a399404a388d8ad2700a01349d0d98069c8e85a4.

Critical Impact

Authenticated attackers can bypass intended ACL checks and access administrative routes handling inventory, warehouse, and settings functionality, leading to unauthorized read, modification, and deletion of CRM data.

Affected Products

• Krayin laravel-crm versions up to and including 2.2.5
• packages/Webkul/Admin/src/Config/acl.php ACL configuration
• packages/Webkul/Admin/src/Http/Middleware/Bouncer.php authorization middleware

Discovery Timeline

• 2026-09-27 - CVE-2026-100883 published to NVD
• 2026-09-28 - Last updated in NVD database
• Patch commit - a399404a388d8ad2700a01349d0d98069c8e85a4 released in laravel-crm v2.2.6

Technical Details for CVE-2026-100883

Vulnerability Analysis

The vulnerability is a Missing Function-Level Authorization issue classified under [CWE-266: Incorrect Privilege Assignment]. The Krayin CRM admin bouncer middleware consulted an ACL map keyed by route name to decide whether a user could access a given function. When a route name was absent from the map, the middleware failed open and granted access rather than denying it. Several administrative routes under admin.settings.warehouse.* were also misregistered, so legitimate ACL entries never matched the actual route names. The combined effect allowed low-privileged authenticated users to invoke administrative endpoints that fall outside the ACL coverage.

Root Cause

Two defects compound the issue. First, acl.php referenced the singular route prefix admin.settings.warehouse.*, while the application registered the plural admin.settings.warehouses.*. The mismatch meant the ACL lookup returned no mapping. Second, the Bouncer middleware's checkIfAuthorized() method returned without action when no mapping was found, implicitly permitting the request.

Attack Vector

Exploitation requires network access and a low-privilege authenticated session. The attacker issues HTTP requests directly to administrative routes that lack an explicit ACL mapping. Because the middleware does not deny unmapped routes, the request reaches controller logic without the permission checks the application was designed to enforce.

// Patch excerpt: packages/Webkul/Admin/src/Config/acl.php
], [
    'key' => 'settings.inventory',
    'name' => 'admin::app.acl.inventory',
-   'route' => ['admin.settings.warehouse.index'],
+   'route' => ['admin.settings.warehouses.index'],
    'sort' => 3,
], [
    'key' => 'settings.inventory.warehouse',
    'name' => 'admin::app.acl.warehouses',
-   'route' => ['admin.settings.warehouse.index'],
+   'route' => ['admin.settings.warehouses.index'],
    'sort' => 1,
], [
    'key' => 'settings.inventory.warehouse.create',
    'name' => 'admin::app.acl.create',
-   'route' => ['admin.settings.warehouse.create', 'admin.settings.warehouse.store'],
+   'route' => ['admin.settings.warehouses.create', 'admin.settings.warehouses.store'],
    'sort' => 1,
],

Source: GitHub Commit a399404

The patched Bouncer middleware now fails closed and inherits permissions from the nearest mapped ancestor:

// Patch excerpt: packages/Webkul/Admin/src/Http/Middleware/Bouncer.php
public function checkIfAuthorized()
{
    $routeName = Route::currentRouteName();

    if (! $routeName) {
        return;
    }

    $roles = acl()->getRoles();

    /**
     * Exact ACL mapping.
     */
    if (isset($roles[$routeName])) {
        bouncer()->allow($roles[$routeName]);
    }
    // ... ancestor-inheritance and deny-by-default logic follows
}

Source: GitHub Commit a399404

Detection Methods for CVE-2026-100883

Indicators of Compromise

• HTTP requests from low-privilege user sessions to admin routes such as /admin/settings/warehouses/*, /admin/settings/warehouses/create, or /admin/settings/warehouses/delete.
• Successful HTTP 200 responses on administrative endpoints from accounts that lack the corresponding role.
• Unexpected create, update, or delete operations in audit logs tied to warehouse, inventory, or settings resources.

Detection Strategies

• Review Laravel route logs and correlate the authenticated user role against the invoked route to flag unmapped admin routes being hit by non-admin accounts.
• Diff deployed acl.php and Bouncer.php against the v2.2.6 reference to confirm whether the deny-by-default logic is present.
• Hunt in web server access logs for authenticated POST, PUT, PATCH, and DELETE requests to /admin/settings/* paths originating from non-administrator sessions.

Monitoring Recommendations

• Forward Laravel application logs and web server access logs into a centralized analytics pipeline for role-vs-route correlation.
• Alert on bulk access to administrative endpoints within short time windows from a single session.
• Baseline normal admin route usage per role so that deviations surface quickly.

How to Mitigate CVE-2026-100883

Immediate Actions Required

• Upgrade Krayin laravel-crm to version 2.2.6 or later immediately.
• Audit existing CRM user accounts and revoke any unexpected privileges or recently created administrative users.
• Review audit trails for warehouse, inventory, and settings changes performed since deployment to confirm integrity.

Patch Information

The vendor fix is included in GitHub Release v2.2.6 and delivered through commit a399404a388d8ad2700a01349d0d98069c8e85a4. The patch corrects the route-name mismatch in acl.php and rewrites Bouncer::checkIfAuthorized() to deny by default, inherit from the nearest mapped ancestor, and allow only an explicit allow-list for authentication and self-service UI helpers. See the GitHub Advisory on Authorization and GitHub Issue #2623 for background.

Workarounds

• Restrict network access to the Krayin admin interface using a reverse proxy or WAF rule limiting /admin/settings/* to known administrator IP ranges.
• Temporarily disable low-privileged user accounts that do not require active CRM access until the upgrade is complete.
• Add a custom middleware that explicitly denies any authenticated route request not matched by the ACL map until the official patch is deployed.

# Upgrade Krayin laravel-crm to the patched release
composer require krayin/laravel-crm:^2.2.6
php artisan config:clear
php artisan route:clear
php artisan cache:clear