What is CVE-2026-42844?

CVE-2026-42844 is a high-severity vulnerability in Getgrav Grav, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-05-12.

How severe is CVE-2026-42844?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Getgrav Grav

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…

Vulnerability class: Privilege Escalation

EPSS: 0.000 (14.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Getgrav Grav — versions 2.0.0-beta.2, 2.0.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management
CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42844?: CVE-2026-42844 is a high-severity vulnerability in Getgrav Grav, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-05-12.
How severe is CVE-2026-42844?: High severity. CVSS v3 base score is 8.8 out of 10.