CVE-2026-23684 Overview
A race condition vulnerability exists in SAP Commerce Cloud that affects the shopping cart functionality. When an attacker exploits this vulnerability during the product addition process, it may result in a cart entry being created with erroneous product values that can subsequently be checked out. This vulnerability leads to high impact on data integrity, with no impact on data confidentiality or availability of the application.
Critical Impact
Attackers can exploit timing conditions during cart operations to manipulate product entries, potentially leading to incorrect pricing or unauthorized product substitution during checkout.
Affected Products
- SAP Commerce Cloud
Discovery Timeline
- 2026-02-10 - CVE-2026-23684 published to NVD
- 2026-02-10 - Last updated in NVD database
Technical Details for CVE-2026-23684
Vulnerability Analysis
This vulnerability is classified as CWE-366 (Race Condition within a Thread), indicating a time-of-check time-of-use (TOCTOU) style flaw in the SAP Commerce Cloud cart handling mechanism. The issue arises from improper synchronization when multiple concurrent requests attempt to modify cart contents simultaneously.
The vulnerability requires network access and exploits a high-complexity attack scenario where the attacker must precisely time their requests to trigger the race condition. No user interaction or special privileges are required to attempt exploitation, though successful exploitation depends on winning the race condition.
When exploited, the vulnerability primarily impacts data integrity by allowing erroneous product entries to persist in the cart and proceed through checkout. The cart validation logic fails to properly verify product consistency when concurrent modification requests create a race condition window.
Root Cause
The root cause stems from inadequate thread synchronization mechanisms in the cart entry creation workflow. When products are added to a cart, the system performs validation checks that are not atomic with the actual cart modification operation. This creates a window where concurrent requests can interleave, causing the cart to accept product entries with values that were not properly validated.
The CWE-366 classification indicates that the application uses shared state or resources without adequate locking or synchronization, allowing race conditions to corrupt the intended data flow.
Attack Vector
The attack vector is network-based, requiring the attacker to send carefully timed HTTP requests to the SAP Commerce Cloud application. The attacker would need to:
- Identify the cart modification endpoints
- Craft concurrent requests that add products to a cart simultaneously
- Time the requests to exploit the synchronization gap between validation and modification
- Successfully create a cart entry with manipulated or erroneous product values
- Complete the checkout process with the tampered cart contents
Due to the high attack complexity, successful exploitation requires precise timing and potentially multiple attempts to win the race condition.
Detection Methods for CVE-2026-23684
Indicators of Compromise
- Unusual patterns of rapid, concurrent requests to cart modification endpoints from the same session or IP address
- Cart entries with product values that do not match expected catalog data or pricing information
- Checkout transactions where the product details differ from what was initially added to the cart
- Anomalous timing patterns in cart-related API calls suggesting automated exploitation attempts
Detection Strategies
- Implement application-level logging to capture timing information for cart modification operations
- Deploy web application firewall (WAF) rules to detect abnormal request patterns targeting cart endpoints
- Monitor for discrepancies between product catalog values and actual cart entry data
- Configure alerts for high-frequency concurrent requests to shopping cart APIs from individual sessions
Monitoring Recommendations
- Enable detailed transaction logging for the cart and checkout workflow in SAP Commerce Cloud
- Monitor application performance metrics for unusual concurrency patterns during cart operations
- Review checkout audit logs for transactions with product inconsistencies
- Implement real-time alerting for failed validation attempts followed by successful cart modifications
How to Mitigate CVE-2026-23684
Immediate Actions Required
- Review and apply the security patch referenced in SAP Note #3689543
- Monitor cart transactions for anomalous behavior until the patch can be applied
- Consider implementing additional validation checks at the checkout stage as a defense-in-depth measure
- Audit recent checkout transactions for potential exploitation indicators
Patch Information
SAP has released a security update to address this vulnerability. Organizations should apply the patch as documented in SAP Note #3689543. Additional information is available through the SAP Security Patch Day portal.
The patch addresses the race condition by implementing proper synchronization mechanisms to ensure atomic validation and modification of cart entries.
Workarounds
- Implement rate limiting on cart modification endpoints to reduce the likelihood of successful race condition exploitation
- Add server-side validation at checkout to verify cart entry integrity against the product catalog before processing orders
- Consider implementing optimistic locking or transaction isolation at the application layer for cart operations
- Enable additional logging and monitoring to detect exploitation attempts while awaiting patch deployment
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
