How severe is CVE-2026-31822?

CVE-2026-31822 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-31822 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31822?

CVE-2026-31822 affects Sylius. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31822?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-31822 have an EU (EUVD) identifier?

Yes. CVE-2026-31822 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10917.

When was CVE-2026-31822 published?

CVE-2026-31822 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-31822

CVE-2026-31822 is a medium-severity vulnerability in Sylius with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.3
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10917
Weakness: CWE-79
Affected product: Sylius
Published: 2026-03-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-31822?: 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.
How severe is CVE-2026-31822?: CVE-2026-31822 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-31822 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31822?: CVE-2026-31822 affects Sylius. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31822?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-31822 have an EU (EUVD) identifier?: Yes. CVE-2026-31822 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10917.
When was CVE-2026-31822 published?: CVE-2026-31822 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://github.com/Sylius/Sylius/security/advisories/GHSA-vgh8-c6fp-7gcg

Affected products (1)

cpe:2.3:a:sylius:sylius:*:*:*:*:*:*:*:*

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