What is CVE-2026-21291?

CVE-2026-21291 is a medium-severity vulnerability in Adobe Commerce, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-11.

How severe is CVE-2026-21291?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Adobe Commerce

CVE-2026-21291

Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a high-privileged attacker to inject malicious…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (25.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Adobe Commerce — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

helpx.adobe.com/security/products/magento/apsb26-05.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-21291?: CVE-2026-21291 is a medium-severity vulnerability in Adobe Commerce, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-11.
How severe is CVE-2026-21291?: Medium severity. CVSS v3 base score is 4.8 out of 10.