What is CVE-2026-9809?

CVE-2026-9809 is a high-severity vulnerability, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-05-29.

How severe is CVE-2026-9809?

High severity. CVSS v3 base score is 7.6 out of 10.

CVE-2026-9809

CVE-2026-9809

A stored Cross-Site Scripting (XSS) vulnerability exists in the Projects component of Mautic 7. When displaying project tags and popovers on administrative detail views (such as campaigns, emails, or forms), user-supplied project names are…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (7.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N.

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@mautic.org

Frequently asked questions

What is CVE-2026-9809?: CVE-2026-9809 is a high-severity vulnerability, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-05-29.
How severe is CVE-2026-9809?: High severity. CVSS v3 base score is 7.6 out of 10.