CVE-2026-42608

[Catalogo CVE]

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as __form-flash-id in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an index.yaml file containing attacker-controlled data. This vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments. This vulnerability is fixed in 2.0.0-beta.2.

Gravità

High · CVSS 8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

May 11, 2026, 3:02:15 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.60% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "grav",
      "fixed_version": "2.0.0",
      "applicability_unknown": true
    },
    {
      "name": "grav",
      "fixed_version": "",
      "applicability_unknown": true
    },
    {
      "name": "grav",
      "ranges": [],
      "ecosystem": "cpe",
      "provider_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42608",
      "fixed_version": "",
      "provider_source": "nvd",
      "provider_record_id": "NVD-CVE-2026-42608",
      "provider_updated_at": "2026-10-26T18:10:00.173"
    }
  ]
}