PT-2026-60642

Name of the Vulnerable Software and Affected Versions Grav versions prior to 2.0.4 Description A two-factor authentication bypass exists in the login plugin. The regenerate2FASecret task fails to verify authorization during the pending TOTP Time-based One-Time Password challenge window, checking...

PT-2026-60640

Grav before 2.0.4 ships a default .htaccess and reference webserver-configs/htaccess.txt whose rules blocking access to sensitive file types .yaml, .php, .json, etc. lack the NC flag, making extension matching case-sensitive. On case-insensitive filesystems Windows/NTFS, macOS/HFS+, or Docker...

CVE-2026-62230: Improper Handling of Case Sensitivity

Grav before 2.0.4 ships a default .htaccess and reference webserver-configs/htaccess.txt whose rules blocking access to sensitive file types .yaml, .php, .json, etc. lack the NC flag, making extension matching case-sensitive. On case-insensitive filesystems Windows/NTFS, macOS/HFS+, or Docker...

CVE-2026-62237: Inefficient Regular Expression Complexity

Grav before 2.0.4 contains a regular expression denial of service ReDoS vulnerability in the regexreplace filter and function, which are allowlisted in the Twig content sandbox. When Twig processing in page content is enabled security.twigcontent.processenabled: true, disabled by default, an...

CVE-2026-62235: Missing Authorization

Grav Flex-Objects before version 1.4.3 contains a broken access control vulnerability in the admin-next REST API that allows authenticated users with only api.access permission to perform unauthorized CRUD operations on permission-less directories. Attackers with api.access credentials can create...

CVE-2026-62231: Incorrect Authorization

The Grav API plugin getgrav/grav-plugin-api before 1.0.6 contains an authorization bypass: API keys can be created with a restricted scopes array, but the ApiKeyAuthenticator class never reads or enforces these scopes. It loads and returns the owning user's full account object, so a key created...

CVE-2026-62233: Authorization Bypass Through User-Controlled Key

grav-plugin-api before 1.0.6 fails to validate super-admin status in createApiKey, generate2fa, and disable2fa endpoints, allowing non-super api.users.write managers to escalate to super-admin. Attackers can mint API keys bound to super-admin accounts or strip 2FA from super-admin users to achiev...

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 via the ZipArchiver and GPM\Installer process. An attacker can exhaust disk spa...

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 in the Security::detectXss process. An attacker can execute arbitrary JavaScript in visitors' browsers by crafting...

Insufficient Session Expiration

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Insufficient Session Expiration due to the improper invalidation of JWT access tokens, which are issued without a unique identifier and cannot...

Duplicate Advisory: Grav: XSS Blueprint Validation Bypass via Twig String Concatenation

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-2c4f-86xc-cr74. This link is maintained to preserve external references. Original Description Grav v2.0.0 contains a cross-site scripting vulnerability fixed in 2.0.1. The XSS blueprint validator...

Duplicate Advisory: Grav: Decompression-bomb size cap bypassed by forged ZIP size in ZipArchiver/Installer

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-8h9x-89f2-m7x3. This link is maintained to preserve external references. Original Description Grav 2.0.1 contains a decompression-bomb size-cap bypass in ZipArchiver and GPM\Installer. The size bound introduced ...

CVE-2026-61873

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that a...

CVE-2026-61457

The Grav API plugin getgrav/grav-plugin-api before 1.0.3 contains a file upload extension bypass in the API media controller. HandlesMediaUploads::validateFileExtension inspects only the final file extension via pathinfo$filename, PATHINFOEXTENSION, so a user with api.media.write permission can...

CVE-2026-61452

The Grav API plugin getgrav/grav-plugin-api before 2.0.4 contains an improper session invalidation vulnerability where JWT access tokens are issued without a jti JWT ID claim and therefore cannot be revoked server-side. Unlike refresh tokens, access tokens remain valid for their full lifetime...

CVE-2026-61453

Grav v2.0.0 contains a cross-site scripting vulnerability fixed in 2.0.1. The XSS blueprint validator Security::detectXss runs on raw page content before Twig processing. When Twig content processing is enabled twigcontent.processenabled: true, an attacker with page-write API permission can use...

CVE-2026-61451

The Grav API plugin grav-plugin-api before 1.0.4 does not validate the origin of the client-supplied adminbaseurl field in the POST /api/v1/auth/forgot-password endpoint. The sanitizeHttpUrl function only checks that the URL scheme is http/https and never verifies the host against the server's ow...

CVE-2026-61449

Grav 2.0.1 contains a decompression-bomb size-cap bypass in ZipArchiver and GPM\Installer. The size bound introduced in 2.0.1 sums the uncompressed size declared in each entry's ZIP central-directory header ZipArchive::statIndex'size' and rejects archives exceeding...

CVE-2026-58655

The bundled Grav Flex Objects plugin getgrav/grav-plugin-flex-objects before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values page.header.flex.collection.title or...

CVE-2026-61873 Grav before 9.1.8 Arbitrary File Write via Twig-Processed Filename

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that a...