CVE-2026-110590 Missing authorization in Klarna for WooCommerce
Unauthenticated attackers can enumerate all orders and access sensitive PII via the order-pay endpoint due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110590?
CVE-2026-110590 is a high-severity missing authorization vulnerability in klarnaplugin Klarna for WooCommerce, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Klarna for WooCommerce plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.13.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to access any order's secret order_key and full billing and shipping PII — including first name, last name, email address, phone number, street address, postcode, city, region, and country — emitted inline as the klarna_payments_params JavaScript variable, enabling full store-wide order enumeration. Because WooCommerce order IDs are sequential integers and no order_key or authenticated session is required, every order in the store can be trivially enumerated with sequential GET requests to the order-pay endpoint.
Weakness: CWE-862
Which versions are affected by CVE-2026-110590?
How do I fix CVE-2026-110590?
No fix has been published for CVE-2026-110590 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-110590 being exploited?
There is no known exploitation of CVE-2026-110590 in the wild and no public exploit code.
Sources
Also known as GHSA-7vpq-x8hh-4w5f.