PT-2026-81136

Grav before 3.9.2 fails to validate untrusted Host headers in the sendInvitationEmail function when constructing token-bearing invitation links. Attackers can manipulate the Host header to poison invitation links and redirect users to attacker-controlled domains, bypassing the require trusted hos...

PT-2026-81142

The Grav Login plugin getgrav/grav-plugin-login before 3.9.1 is vulnerable to email address enumeration. The register method in classes/Login.php throws a distinct exception EMAIL NOT AVAILABLE when a submitted email address already belongs to an existing account, while allowing registration to...

CVE-2026-56707: Missing Authorization

Grav Flex Objects plugin versions 1.4.0 through 1.4.7 contain an authorization bypass vulnerability in the flex-objects shortcode that allows users with page-edit access to render any registered Flex collection without permission checks. Attackers can place the shortcode in published pages to...

PT-2026-81148

Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet and offsetexists methods that lack field filtering. Attackers with page-edit permissions can call offsetGet on User objects to extract hashed passwords and 2FA secrets, enabling offli...

GHSA-8HGV-XC77-JMCR Grav: Page editors can inject arbitrary script into rendered pages via the Twig sandbox's assets.addJs/addCss allowlist, escalating to super-admin

Summary Grav 2.0 renders editor-authored Twig in page content by default and relies on the Twig content sandbox to contain it. The shipped sandbox policy allowlists addcss and addjs on Grav\Common\Assets system/src/Grav/Common/Twig/Sandbox/SandboxDefaults.php:307. Because the sandbox arbitrates t...

Cross-site Scripting (XSS)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the addJs and addCss methods in the Twig sandbox allowlist. An attacker can execute arbitrary scripts in the...

Regular Expression Denial of Service (ReDoS)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS in the regexReplace process. An attacker can exhaust server resources and cause denial of service b...

Improper Authentication

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Improper Authentication in the login.regenerate2FASecret process. An attacker can gain unauthorized access by submitting a correct password fo...

Improper Handling of Case Sensitivity

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity in the .htaccess process on case-insensitive filesystems due to the lack of case-insensitive matching fo...

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

Summary The default .htaccess shipped with Grav and the reference webserver-configs/htaccess.txt contains security rules that block direct HTTP access to sensitive file types .yaml, .yml, .php, .json, .twig, etc. under user/ and system/vendor/ directories. However, these rules lack the NC No Case...

GHSA-VWG3-W8W3-PC79 Grav: .htaccess file extension rules bypass via case variation on case-insensitive filesystems

Summary The default .htaccess shipped with Grav and the reference webserver-configs/htaccess.txt contains security rules that block direct HTTP access to sensitive file types .yaml, .yml, .php, .json, .twig, etc. under user/ and system/vendor/ directories. However, these rules lack the NC No Case...

Arbitrary Code Injection

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Arbitrary Code Injection via the dynamicData function. An attacker can execute arbitrary code by supplying a crafted callback and arguments,...

Server-side Request Forgery (SSRF)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the WebhookController.php and WebhookDispatcher.php processes. An attacker can access internal resources,...

Information Exposure

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Information Exposure in the grav.offsetGet process. An attacker can access sensitive configuration data, such as SMTP credentials, API keys, a...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the extract process. An attacker can cause resource exhaustion by submitting...

CVE-2026-64852

Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.8, the Grav API plugin intercepts the apiKeyGenerate and apiKeyRevoke admin tasks in user/plugins/api/api.php and authorizes the caller with only admin.login. A basic panel user c...

CVE-2026-64851

Grav Shortcode Core Plugin allows for the development shortcode plugins that utilize the common format utilized by WordPress and BBCode. Prior to 6.2.2, Grav Shortcode Core passes shortcode syntax through Security::detectXss because it contains no literal less-than character, then...

CVE-2026-64850

Grav is a file-based Web platform. Prior to 2.0.7, Grav Blueprint::dynamicData in system/src/Grav/Common/Data/Blueprint.php sends an editor-controlled Class::method provider and arguments to calluserfuncarray without rejecting dangerous callback parameters. An account with admin.pages or...

CVE-2026-63408

Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin JwtAuthenticator::extractBearerToken accepts a JWT from the token URL query parameter on every /api/v1 route, including state-changing endpoints...

CVE-2026-63407

Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin c...