Security Advisory

CVE-2026-42608

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-11 15:02:15

Last updated 2026-05-11 16:07:54

Assigner GitHub_M

CVSS score 8.8

State PUBLISHED

Description

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.

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