CVE-2026-42844CWE-269CWE-434

Grav: Low-privileged API users can create super-admin accounts via blueprint-upload

High · published May 12, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00480 · 40.4th percentile
Weaknesses
CWE-269 · Improper Privilege Management; CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-05-12T21:43Z
EPSS history
Timeline
  • 12 MAY 21:43Z
    Grav: Low-privileged API users can create super-admin accounts via blueprint-upload
    cvelistv5