Is CVE-2026-42843 actively exploited?

No active exploitation of CVE-2026-42843 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42843 be exploited remotely?

Yes. CVE-2026-42843 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42843?

CVE-2026-42843 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-42843

CWE-863Published: May 11, 2026· Updated: May 13, 2026

8.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.7th

Official Description

Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content, media, configuration, users, and system management. Prior to 1.0.0-beta.15, an insecure direct object reference and logic flaw in the Grav API plugin (UsersController::update) allows any authenticated user with basic API access (api.access) to modify their own permission configuration. An attacker can exploit this to escalate their privileges to Super Administrator (admin.super and api.super), leading to full system compromise and potential RCE. This vulnerability is fixed in 1.0.0-beta.15.

NVD Source

Technical Analysis

CVE-2026-42843 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.