CVE-2026-85604
Grav before 2.0.18 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike |map/|filter/|reduce, |sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.
- Score
- CVSS 3.1 8.8 High
- Status
- Deferred - disclosure@vulncheck.com
- Published
- 2026-09-04
- Last modified
- 2026-09-08
- Weaknesses
- CWE-94
Affected products
References
- https://github.com/getgrav/grav/security/advisories/GHSA-p6qj-p5m7-f62h
- https://www.vulncheck.com/advisories/grav-before-2.0.19-remote-code-execution-via-sort-filter
