CVE-2026-79409: Bagisto Information Disclosure Vulnerability

CVE-2026-79409 Overview

CVE-2026-79409 is an information disclosure vulnerability in Webkul Bagisto 2.4.9, an open-source Laravel-based eCommerce platform. Authenticated remote attackers can obtain sensitive information by abusing the add-to-cart API and the downloadable product fulfilment components. The flaw is classified as an Insecure Direct Object Reference issue [CWE-639], where the application authorizes access based on user-supplied identifiers without verifying ownership. An attacker with a low-privileged account can retrieve data or resources belonging to other customers.

Critical Impact
Authenticated attackers can access downloadable digital products and cart-associated data belonging to other users through the add-to-cart API and downloadable fulfilment endpoints.

Affected Products

Webkul Bagisto 2.4.9
Bagisto add-to-cart API component
Bagisto downloadable product fulfilment component

Discovery Timeline

2026-09-15 - CVE-2026-79409 published to the National Vulnerability Database
2026-09-15 - Last updated in NVD database

Technical Details for CVE-2026-79409

Vulnerability Analysis

Bagisto exposes shopping cart and downloadable fulfilment functionality through REST endpoints that accept object identifiers directly from client requests. The add-to-cart API and downloadable delivery routes trust these identifiers without confirming the requesting account owns the referenced resource. An authenticated attacker can enumerate or substitute identifiers to reference carts, product variants, or downloadable assets tied to other customers. The application returns the associated content, exposing information the attacker should not view.

This is a confidentiality-only impact. Integrity and availability of the store remain intact. The vulnerability requires an authenticated session but no elevated privileges, and it is exploitable over the network with low attack complexity.

Root Cause

The root cause is missing authorization checks on resource identifiers passed to the cart and downloadable fulfilment handlers. The endpoints implement authentication but not per-object authorization. This matches the [CWE-639] pattern of authorization bypass through user-controlled keys.

Attack Vector

Exploitation requires the attacker to hold any authenticated customer account. The attacker issues requests to the add-to-cart API or downloadable fulfilment endpoints while substituting identifiers referencing another customer's cart items or downloadable products. Because identifiers are typically sequential integers, enumeration is trivial. Full exploitation details are documented in the public write-up on GitHub.

Detection Methods for CVE-2026-79409

Indicators of Compromise

Sequential or non-sequential enumeration of numeric identifiers in requests to /api/checkout/cart and downloadable product endpoints from a single authenticated session.
HTTP 200 responses returning cart contents or download links for records the authenticated user did not create.
Anomalous download activity from customer accounts that never completed a matching purchase.

Detection Strategies

Correlate the authenticated user identifier in application logs with the owner_id or customer_id of returned cart and downloadable records. Flag mismatches.
Alert on high-volume iteration of cart_id, item_id, or download_link_id parameters from a single session or IP address.
Deploy web application firewall rules that inspect Bagisto API traffic for parameter tampering patterns on cart and download routes.

Monitoring Recommendations

Enable verbose application logging for authenticated access to /customer/downloadable-products and cart mutation endpoints.
Ingest Bagisto application and web server logs into a centralized analytics platform to enable cross-session correlation.
Review CDN or storage access logs for downloadable asset retrievals that do not map to a valid completed order for the requesting user.

How to Mitigate CVE-2026-79409

Immediate Actions Required

Restrict access to the add-to-cart API and downloadable fulfilment routes at the reverse proxy or web application firewall until a patch is applied.
Audit existing customer accounts and download logs for evidence of cross-account access since the deployment of Bagisto 2.4.9.
Rotate any exposed downloadable digital assets and reissue purchase-specific download links.

Patch Information

At the time of publication, no vendor advisory or fixed version has been referenced in the NVD entry for CVE-2026-79409. Monitor the Webkul Bagisto repository and the public CVE write-up for remediation guidance and apply updates as soon as they are released.

Workarounds

Implement server-side authorization middleware that validates the authenticated customer_id matches the owner of every cart, cart item, and downloadable resource referenced by ID.
Replace predictable numeric identifiers on downloadable links with unguessable, single-use tokens scoped to the purchasing customer.
Enforce short expiration windows on downloadable product URLs and log every access attempt for later review.

bash

# Example nginx rule to block unauthenticated enumeration of downloadable endpoints
location ~* ^/customer/downloadable-products {
    if ($cookie_bagisto_session = "") { return 403; }
    limit_req zone=api_burst burst=5 nodelay;
}