CVE-2026-116019
Deferred Deferred - Pending Action

Grav CMS allowlist bypass via crafted Flex form fields

Publication date: 2026-10-24

Last updated on: 2026-10-24

Assigner: VulnCheck

Description
Grav 2.0.15 before 2.2.13 contains an allowlist bypass vulnerability that allows page editors to invoke arbitrary public static methods by relocating data-*@ directives with unset-name@ or integer keys. Attackers with page-edit permission can embed crafted fields in Flex form overrides in page frontmatter to call methods like Folder::delete or Utils::download, deleting directories, overwriting files, or reading files outside the page tree.

CVSS Scores

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Meta Information

Published
2026-10-24
Last Modified
2026-10-24
Generated
2026-10-24
AI Q&A
2026-10-24
EPSS Evaluated
N/A
NVD
CVE-2026-116019
EUVD
EUVD-2026-109277

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
getgrav grav 2.0.15

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-749 The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.

Attack-Flow Graph

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Executive Summary

Grav CMS versions 2.0.15 through 2.2.12 are vulnerable to an allowlist bypass. Page editors with specific permissions can exploit Flex form override directives by manipulating data-*@ fields with unset-name@ or integer keys. This allows them to call arbitrary public static methods like Folder::delete or Utils::download, leading to file and directory manipulation outside the intended page tree.

Detection Guidance

Check Grav CMS version with: grep -r "version" /path/to/grav/vendor/getgrav/grav/CHANGELOG.md. If version is 2.0.15 to 2.2.12, the system is vulnerable. Inspect page frontmatter for crafted data-*@ directives with unset-name@ or integer keys in Flex form overrides.

Impact Analysis

Attackers with page-edit permissions could delete directories, overwrite files, or read files outside the page tree. This could lead to data loss, unauthorized access to sensitive files, or system compromise. The impact is severe due to the high CVSS score of 8.7.

Compliance Impact

This vulnerability could lead to unauthorized file access or deletion, violating data integrity and confidentiality requirements in GDPR and HIPAA. Unauthorized access to sensitive files may result in non-compliance with these regulations, potentially leading to legal and financial penalties.

Mitigation Strategies

Upgrade Grav CMS to version 2.2.13 or later immediately. Review and remove any suspicious Flex form overrides in page frontmatter. Restrict page-edit permissions to trusted users only.

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