CVE-2026-42844

8.8 HIGH

Grav is a file-based Web platform

Published: 2026-05-12 · Last updated: 2026-05-19

Severity and scoring

CVSS: 8.8 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-269, CWE-434

Affected products

Vendor	Product
getgrav	grav

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42844
[Vendor advisory]https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h
[Vendor advisory]https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h

Related CVEs

Same vendor

CVE-2026-42843 — Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content, media, configuration, users, and... (8.8 HIGH)

Same CWE

CVE-2024-38487 — api-gateway container running with root privilege would allow an attacker to escape the container and access host system to perform unint... (7.0 HIGH)
CVE-2026-12313 — Information disclosure, sandbox escape in the Security: Process Sandboxing component (4.7 MEDIUM)
CVE-2026-12289 — Privilege escalation in the Graphics: WebRender component (8.8 HIGH)
CVE-2026-40750 — Unrestricted Upload of File with Dangerous Type vulnerability in themagnifico52 Kids Online Store allows Upload a Web Shell to a Web Server (9.9 CRITICAL)
CVE-2026-8176 — The LatePoint – Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Privilege Escalation to Adminis... (7.5 HIGH)