TI-2026-44781 Aliases CVE-2026-62673 GHSA-vwg3-w8w3-pc79

Grav: .htaccess file extension rules bypass via case variation on case-insensitive filesystems

HIGH 69CWE-178Published 2026-08-19 · Updated 2026-08-21

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Grav is a file-based Web platform. Prior to 2.0.4, the Grav .htaccess and webserver-configs/htaccess.txt security rules omit the Apache [NC] flag and therefore compare sensitive directory and file-extension patterns case-sensitively. On a case-insensitive filesystem, an unauthenticated requester can use uppercase directory or extension variants to bypass the rules and retrieve files under user/accounts or user/config, including password hashes and security configuration. This issue is fixed in version 2.0.4.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00538 45th percentileScored 2026-11-07

Fix Fixed grav (getgrav): 2.0.4getgrav/grav (Packagist): 2.0.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

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 2.0.4	2.0.4	Patch available	CNA
—	getgrav/grav (Packagist)	before 2.0.4	2.0.4	Patch available	GHSA-vwg3-w8w3-pc79

grav Vendorgetgrav Affected before 2.0.4 Fixed in 2.0.4 Patch available CNA
getgrav/grav (Packagist) Vendor— Affected before 2.0.4 Fixed in 2.0.4 Patch available GHSA-vwg3-w8w3-pc79

Remediation

Fix · CNA grav (getgrav) Fixed in 2.0.4
Fix · GHSA-vwg3-w8w3-pc79 getgrav/grav (Packagist) Fixed in 2.0.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-62673
2026-10-03 Alias added: GHSA-vwg3-w8w3-pc79

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-62673

Other 4

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