Authorization bypass through user-controlled key in Sylius - CVE-2026-31820
Published: April 27, 2026
Vulnerability identifier: #VU128215
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31820
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to authorization bypass through a user-controlled key in shop LiveComponents when processing user-supplied #[LiveArg] resource identifiers. A remote user can supply a crafted addressId or cartId value to disclose sensitive information.
The issue affects the checkout address FormComponent addressFieldUpdated action and the cart WidgetComponent and SummaryComponent refreshCart actions. The cart-related exposure can include data from completed orders because active carts and completed orders share the same ID space.
Affected software
Sylius
How to mitigate CVE-2026-31820
Install security update from vendor's website.
Sylius - addressed in versions 2.0.16, 2.1.12, 2.2.3