File Upload Vulnerability in Grav Web Platform by Getgrav
CVE-2026-42844

8.7HIGH

Key Information:

Vendor

Getgrav

Status
Grav
Vendor
CVE Published:
12 May 2026

What is CVE-2026-42844?

In Grav 2.0.0-beta.2, a low-privileged authenticated API user can exploit the /api/v1/blueprint-upload endpoint to upload arbitrary YAML files into the user/accounts/ directory. This allows the attacker to create a new user account with api.super privileges, leading to a complete administrative compromise of the Grav API. This vulnerability has been addressed in API version 1.0.0-beta.17.

Affected Version(s)

grav 2.0.0-beta.2

References

https://github.com/getgrav/grav/security/advisories/GHSA-...
x_refsource_CONFIRM

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.