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CVE-2026-42844

8.8 · HIGH

Grav is a file-based Web platform.

Published May 12, 2026CWE-269EPSS 0.48%

Overview

CVE-2026-42844 is a high-severity vulnerability. It was published on May 12, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756hGitHubgithub.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h

How CyberStrike helps

Frequently asked questions

What is CVE-2026-42844?

CVE-2026-42844 is a high-severity vulnerability. It was published on May 12, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-42844?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-42844?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-42844?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-42844 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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