CVE-2026-86197

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    CVE-2026-86197

    Published: 5 Sept 2026Last Modified: 12 Sept 2026

    Summary: Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox

    Details: Grav before 2.0.20 contains a cross-site scripting vulnerability in the Twig sandbox policy that allowlists addJs and addCss methods on Grav\Common\Assets without proper output escaping. Page editors can inject arbitrary script by registering malicious assets or injecting attributes, which are rendered unescaped into document head tags and executed for all visitors including administrators.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86197.json, https://github.com/getgrav/grav/security/advisories/GHSA-8hgv-xc77-jmcr, https://nvd.nist.gov/vuln/detail/CVE-2026-86197, https://www.vulncheck.com/advisories/grav-before-2.0.20-cross-site-scripting-via-assets-sandbox

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -812e57d2298a394db308e4d907f02e2e96e00b54

    Affected versions

    2.0.19
    2.0.18
    2.0.17
    2.0.16
    2.0.15
    2.0.14
    2.0.13
    2.0.12
    2.0.11
    2.0.10
    2.0.9
    2.0.8
    2.0.7
    2.0.6
    2.0.5
    2.0.4
    2.0.3
    2.0.2
    2.0.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-86197 | CVE-DB