CVE-2026-42844

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h	Exploit Vendor Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:getgrav:grav:2.0.0:beta2:*:*:*:*:*:*

History

19 May 2026, 21:00

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h - Exploit, Vendor Advisory
First Time		Getgrav grav Getgrav
CPE		cpe:2.3:a:getgrav:grav:2.0.0:beta2::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8

13 May 2026, 16:16

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h -

12 May 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 22:16

Updated : 2026-05-19 21:00

NVD link : CVE-2026-42844

Mitre link : CVE-2026-42844

CVE.ORG link : CVE-2026-42844

JSON object : View

Products Affected

getgrav

grav

CWE

CWE-269

Improper Privilege Management

CWE-434

Unrestricted Upload of File with Dangerous Type

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