What is CVE-2026-9559?

CVE-2026-9559 is a critical-severity vulnerability, classified under Path Traversal. CVSS score: 9.9/10. Published 2026-05-29.

How severe is CVE-2026-9559?

Critical severity. CVSS v3 base score is 9.9 out of 10.

CVE-2026-9559

CVE-2026-9559

A path traversal vulnerability exists in the campaign import feature of Mautic 7. When extracting uploaded ZIP files during campaign imports, a flaw in the validation logic allows file paths to escape the intended temporary directories. An…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.002 (46.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-73 — External Control of File Name or Path
CWE-98 — PHP Remote File Inclusion

References

security@mautic.org

Frequently asked questions

What is CVE-2026-9559?: CVE-2026-9559 is a critical-severity vulnerability, classified under Path Traversal. CVSS score: 9.9/10. Published 2026-05-29.
How severe is CVE-2026-9559?: Critical severity. CVSS v3 base score is 9.9 out of 10.