TI-2026-30887 Aliases CVE-2026-42607 GHSA-w48r-jppp-rcfw

Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature

HIGH 74CWE-94Published 2026-05-11 · Updated 2026-05-12

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, an authenticated user with administrative privileges can achieve Remote Code Execution (RCE) by uploading a specially crafted ZIP file through the "Direct Install" tool. While the system attempts to block direct .php file uploads, it fails to inspect the contents of uploaded ZIP archives. Once a malicious plugin is extracted, it can execute arbitrary PHP code or drop a persistent web shell on the server. This vulnerability is fixed in 2.0.0-beta.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.04382 91st percentileScored 2026-11-07

Fix Fixed grav (getgrav): 2.0.0-beta.2getgrav/grav (Packagist): 2.0.0-beta.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getgrav	grav	before 2.0.0-beta.2	2.0.0-beta.2	Patch available	CNA
—	getgrav/grav (Packagist)	before 2.0.0-beta.2	2.0.0-beta.2	Patch available	GHSA-w48r-jppp-rcfw

grav Vendorgetgrav Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available CNA
getgrav/grav (Packagist) Vendor— Affected before 2.0.0-beta.2 Fixed in 2.0.0-beta.2 Patch available GHSA-w48r-jppp-rcfw

Remediation

Fix · CNA grav (getgrav) Fixed in 2.0.0-beta.2
Fix · GHSA-w48r-jppp-rcfw getgrav/grav (Packagist) Fixed in 2.0.0-beta.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-42607
2026-10-03 Alias added: GHSA-w48r-jppp-rcfw
2026-10-25 EPSS moved to the 90th–95th percentile

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-42607

Other 3

TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3

See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences