CVE-2026-82364 Overview
CVE-2026-82364 is a race condition vulnerability affecting macrozheng mall through version 1.0.3. The flaw resides in the /order/submit endpoint of the Order Submission component. An authenticated remote attacker can exploit concurrent request handling to trigger inconsistent state within the order processing logic. The vendor reportedly deleted the associated GitHub issue without providing an explanation, leaving no official advisory. Exploitation is rated as high complexity and difficult to achieve reliably in production environments. The vulnerability is cataloged under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization.
Critical Impact
Successful exploitation may allow attackers to bypass order integrity controls, potentially duplicating orders, manipulating inventory counts, or causing pricing inconsistencies through concurrent submissions.
Affected Products
- macrozheng mall versions up to and including 1.0.3
- Order Submission component (/order/submit endpoint)
- Deployments of the open-source mall e-commerce platform
Discovery Timeline
- 2026-08-29 - CVE-2026-82364 published to NVD
- 2026-08-31 - Last updated in NVD database
Technical Details for CVE-2026-82364
Vulnerability Analysis
The vulnerability affects the Order Submission workflow of the macrozheng mall application. When multiple requests to /order/submit execute concurrently, the application fails to properly synchronize access to shared resources involved in order creation. This produces a Time-of-Check to Time-of-Use (TOCTOU) window where the validation of order parameters and the persistence of the resulting order state can be interleaved by parallel threads.
Because the endpoint requires authenticated access and the exploitation window is narrow, the practical impact is limited. Reliable exploitation requires precise timing and typically involves burst submission of near-identical requests. Successful races can lead to duplicate order creation, incorrect stock decrement, or inconsistent transaction state within the application database.
Root Cause
The root cause is improper synchronization on shared resources during order submission [CWE-362]. The /order/submit handler does not enforce atomic validation-and-commit semantics through database-level locking, distributed locks, or optimistic concurrency controls such as version checks. Without these guards, two threads can each pass business-logic validation before either persists its result.
Attack Vector
An authenticated attacker sends multiple simultaneous HTTP requests to the /order/submit endpoint over the network. The requests are crafted to reference the same cart items, coupon codes, or stock-limited products. If timing aligns with the unsynchronized code path, the application processes both submissions as valid. No user interaction is required beyond the attacker's own session, and no elevated privileges are needed beyond a standard authenticated user.
No verified public exploit code is available. Refer to the VulDB CVE-2026-82364 Entry and the archived GitHub Issue #983 Discussion for additional context.
Detection Methods for CVE-2026-82364
Indicators of Compromise
- Bursts of near-simultaneous POST requests to /order/submit from a single authenticated session or IP address
- Duplicate order records in the database sharing identical cart contents, user IDs, and creation timestamps within milliseconds of each other
- Inventory levels or coupon redemption counters that decrement below expected minimums
Detection Strategies
- Instrument the order submission service to log request timing, thread identifiers, and transaction boundaries for post-hoc race analysis
- Deploy application-layer rate limiting on /order/submit and alert when the same user submits more than one request within a short window
- Correlate order creation logs with inventory adjustments to identify negative or unexplained stock deltas
Monitoring Recommendations
- Monitor web access logs for parallel requests to /order/submit sharing the same session token or JWT
- Track database-level metrics for duplicate primary key attempts, transaction rollbacks, and constraint violations on the orders table
- Alert on anomalous order-to-user ratios that exceed baseline behavior for a given account
How to Mitigate CVE-2026-82364
Immediate Actions Required
- Inventory all deployments of macrozheng mall and confirm whether versions at or below 1.0.3 are running in production
- Apply rate limiting and per-user request serialization to /order/submit at the API gateway or reverse proxy layer
- Enable database-level constraints and unique indexes to reject duplicate order submissions that share deterministic identifiers
Patch Information
As of the last NVD update on 2026-08-31, no official vendor patch has been published. The vendor deleted the GitHub issue tracking this vulnerability without explanation. Monitor the GitHub Repository: Mall Project for future releases addressing the race condition in the Order Submission component.
Workarounds
- Introduce a distributed lock (for example, Redis-based) keyed by user ID around the order submission critical section
- Use database transactions with SELECT ... FOR UPDATE on inventory and cart rows to serialize concurrent order commits
- Add optimistic concurrency control via a version column on cart and stock records so conflicting writes fail predictably
- Enforce idempotency keys on the /order/submit endpoint so duplicate submissions within a short window are rejected
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
