🛡️ CVE-2026-42608
🔴 CVSS 9.1 — Critical ✅ No Known Exploit CWE-22 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2026-05-05
Updated 2026-06-02
Modified 2026-05-13
Fix URL N/A

Affected Packages

Software From version Fixed in
getgrav/grav 2.0.0-beta.2
grav
unknown

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