CVE-2026-31822 Sylius has a XSS vulnerability in checkout login form
Attackers can execute arbitrary JavaScript in the victim's browser via XSS in the Sylius checkout login form error messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-31822?
CVE-2026-31822 is a medium-severity cross-site scripting vulnerability in Sylius, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Sylius is an Open Source eCommerce Framework on Symfony. A cross-site scripting (XSS) vulnerability exists in the shop checkout login form handled by the ApiLoginController Stimulus controller. When a login attempt fails, AuthenticationFailureHandler returns a JSON response whose message field is rendered into the DOM using innerHTML, allowing any HTML or JavaScript in that value to be parsed and executed by the browser. The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.
Weakness: CWE-79
Which versions are affected by CVE-2026-31822?
6 open source packages ship an affected version, including sylius/sylius. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sylius/sylius Packagist | From 2.0.0 | 2.0.16 |
sylius/sylius Packagist | From 2.0.0 | 2.0.16 |
sylius/sylius Packagist | From 2.1.0 | 2.1.12 |
sylius/sylius Packagist | From 2.1.0 | 2.1.12 |
sylius/sylius Packagist | From 2.2.0 | 2.2.3 |
sylius/sylius Packagist | From 2.2.0 | 2.2.3 |
Products include Sylius Sylius.
How do I fix CVE-2026-31822?
Upgrade sylius/sylius to a fixed version for your release line: 2.0.16, 2.1.12 or 2.2.3.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-31822 being exploited?
There is no known exploitation of CVE-2026-31822 in the wild and no public exploit code.
Other vulnerabilities in Sylius
- CVE-2026-31824 Sylius has a Promotion Usage Limit Bypass via Race Condition
- CVE-2024-57610 Denial of service in n/a
- CVE-2026-31820 Sylius affected by IDOR in Cart and Checkout LiveComponents
- CVE-2022-24743 Insufficient Session Expiration in Sylius
- CVE-2026-31819 Sylius has an Open Redirect via Referer Header
Sources
Also known as GHSA-vgh8-c6fp-7gcg.