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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://github.com/getgrav/grav/security/advisories/GHSA-p6qj-p5m7-f62h

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-04 12:17

Updated : 2026-09-08 20:05

NVD link : CVE-2026-85604

Mitre link : CVE-2026-85604

CVE.ORG link : CVE-2026-85604

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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