Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-62673Grav: .htaccess file extension rules bypass via case variation on case-insensitive filesystems

High 8.2

In plain English

A high-severity security flaw in grav from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.2High

Exploit odds (30 days)0.5%top 54.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	getgrav/grav	2.0.4	GHSA-vwg3-w8w3-pc79

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	< 2.0.4

Weakness: CWE-178 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/getgrav/grav/security/advisories/GHSA-vwg3-w8w3-pc79 x_refsource_CONFIRM
https://github.com/getgrav/grav/commit/8c9d1e7b6fd66ecea80a4bc3783fd41d36e22fb1 x_refsource_MISC
https://github.com/getgrav/grav/releases/tag/2.0.4 x_refsource_MISC