PT-2026-60162 · Getgrav · Grav

Alienkeric · Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-61873

Mitre

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that are processed through Twig templates, allowing them to write arbitrary files including PHP webshells to the web root or other sensitive directories.

Fix

Weakness Enumeration

CWE-73

Related Identifiers

CVE-2026-61873

Affected Products

Grav

References · 3

• https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-61873 · Security Note
• https://vulncheck.com/advisories/grav-before-arbitrary-file-write-via-twig-processed-filename · Note