CVE-2026-85603

CVE-2026-85603

Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-85603?
CVE-2026-85603 is a medium-severity vulnerability, classified under External Control of File Name or Path. CVSS score: 6.5/10. Published 2026-09-04.
How severe is CVE-2026-85603?
Medium severity. CVSS v3 base score is 6.5 out of 10.