Is CVE-2026-42845 actively exploited?

No active exploitation of CVE-2026-42845 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42845 be exploited remotely?

Yes. CVE-2026-42845 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42845?

CVE-2026-42845 has a CVSS score of 7.7 (HIGH).

HOME VULNERABILITIESCVE-2026-42845

HIGH

CVE-2026-42845

CWE-73Published: May 11, 2026· Updated: May 12, 2026

7.7

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official Description

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions (`md`, `yaml`, `yml`, `json`, `twig`, `ini`) regardless of the configurable dangerous-extensions list. A permissive `accept` policy combined with the default `destination: self@` could otherwise let an attacker overwrite the page's own `.md` and pivot to super-admin via a `process: save` action. This vulnerability is fixed in 9.1.0.

NVD Source

Technical Analysis

CVE-2026-42845 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X