CVE-2026-7317 — Grav CMS Insecure Deserialization

title: Grav CMS FileCache Deserialization - CVE-2026-7317
id: scw-2026-04-28-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-7317 in Grav CMS. This rule looks for specific URI paths and query parameters indicative of the insecure deserialization vulnerability in the FileCache::doGet function, which can be triggered via POST requests containing serialized data.
author: SCW Feed Engine (AI-generated)
date: 2026-04-28
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7317/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/grav/vendor/twig/twig/src/Extension/Escaper.php'
      cs-uri-query|contains:
          - 'serialize('
      cs-method|exact:
          - 'POST'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse