CVE-2026-31867 Craft Commerce has a Potential IDOR in Commerce carts
Attackers can hijack shopping carts and access PII by guessing cart IDs due to missing ownership validation in Craft Commerce.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31867?
CVE-2026-31867 is a medium-severity missing authorization vulnerability in craftcms commerce, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Craft Commerce is an ecommerce platform for Craft CMS. Prior to 4.11.0 and 5.6.0, An Insecure Direct Object Reference (IDOR) vulnerability exists in Craft Commerce’s cart functionality that allows users to hijack any shopping cart by knowing or guessing its 32-character number. The CartController accepts a user-supplied number parameter to load and modify shopping carts. No ownership validation is performed - the code only checks if the order exists and is incomplete, not whether the requester has authorization to access it. This vulnerability enables the takeover of shopping sessions and potential exposure of PII. This vulnerability is fixed in 4.11.0 and 5.6.0.
Weakness: CWE-639
Which versions are affected by CVE-2026-31867?
4 open source packages ship an affected version, including craftcms/commerce. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/commerce Packagist | From 4.0.0 | 4.11.0 |
craftcms/commerce Packagist | From 4.0.0 | 4.11.0 |
craftcms/commerce Packagist | From 5.0.0 | 5.6.0 |
craftcms/commerce Packagist | From 5.0.0 | 5.6.0 |
Products include Craftcms Craft Commerce.
How do I fix CVE-2026-31867?
Upgrade craftcms/commerce to a fixed version for your release line: 4.11.0 or 5.6.0.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-31867 being exploited?
There is no known exploitation of CVE-2026-31867 in the wild and no public exploit code.
Other vulnerabilities in craftcms commerce
- CVE-2026-29172 Craft Commerce has a SQL Injection in Commerce Purchasables Table Sorting
- CVE-2026-29174 Craft Commerce has a SQL Injection in Commerce Inventory Table Sorting
- CVE-2026-29175 Multiple Stored XSS in Commerce Inventory Page Leading to Session Hijacking
- CVE-2026-25482 Craft Commerce has Stored DOM XSS in Order Status Name (Reflects in "Recent Orders" Dashboard Widget)
- CVE-2026-25483 Craft Commerce has Stored XSS via Order Status Message with potential database exfiltration
Sources
Also known as GHSA-vff3-pqq8-4cpq.