CVE-2026-91076: CWE-862 Missing Authorization in Robokassa payment gateway for Woocommerce
Description
The Robokassa payment gateway plugin for WooCommerce versions before 1.9.0 does not verify the authenticity of incoming payment notification requests. This allows unauthenticated attackers to mark any WooCommerce order as failed by sending crafted requests referencing sequential order identifiers. This vulnerability affects order fulfillment by enabling attackers to disrupt the processing queue.
Affected software
Robokassa payment gateway for Woocommerce
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-91076 is a missing authorization vulnerability (CWE-862) in the Robokassa payment gateway plugin for WooCommerce prior to version 1.9.0. The plugin fails to authenticate incoming payment-notification requests before acting on the referenced order. Because order IDs are sequential, an attacker can systematically target and force any order into a failed state, disrupting order fulfillment.
Potential Impact
An attacker can unauthenticatedly cause any WooCommerce order to be marked as failed, potentially disrupting order processing and fulfillment. This can lead to denial of service on order handling but does not directly imply data disclosure or code execution.
Mitigation Recommendations
Upgrade the Robokassa payment gateway plugin to version 1.9.0 or later, where this authorization check issue is presumably fixed. Patch status is not explicitly stated but the affected versions are prior to 1.9.0, indicating that 1.9.0 is the fixed version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-14T17:21:23.582Z
- State
- PUBLISHED
Threat ID: 6acf225a2cdf04f656513bb2
Added to database: 10/14/2026, 06:34:02 UTC
Last enriched: 10/14/2026, 06:49:25 UTC
Last updated: 10/14/2026, 19:00:33 UTC
Views: 14
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