CVE-2026-42613: Grav is a file-based Web platform

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CRITICAL 9.4REMOTE

CVE-2026-42613 is a critical-severity flaw (CVSS 9.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration reques

Why this priority

Critical severity
CISA SSVC: public proof of concept
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-20, CWE-862
Published	2026-05-11
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-05-11 16:17 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

Exact fixes by distribution

Composer (PHP) · getgrav/grav · FIXED · 2.0.0-beta.2 · vulnerable: < 2.0.0-beta.2 · source

composer require "getgrav/grav:>=2.0.0-beta.2"

Fedora 46 · fzssh · FIXED · 1.4.0-2.fc46 · FEDORA-2026-8004fcd067 · source

sudo dnf upgrade --advisory=FEDORA-2026-8004fcd067

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: ivanesk315/CVE-2026-42613 (0 stars)
Write-up: github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj
Write-up: github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42613?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-42613 being exploited?

CVE-2026-42613 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42613 affect?

CVE-2026-42613 affects affected software. Severity is critical (CVSS 9.4). Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registratio

How urgent is CVE-2026-42613?

Priority 60/100. Critical severity; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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