CVE-2026-86197— Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox
Quick assessment
Affected
getgrav grav
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Grav 在 2.0.20 之前的版本中，由于 Twig 沙箱策略对 类中的 和 方法进行了白名单授权，但未进行适当的输出转义，从而存在跨站脚本（XSS）漏洞。页面编辑者可以通过注册恶意资源或注入属性来插入任意脚本；这些脚本会被未转义地渲染到文档的 标签中，并对所有访问者（包括管理员）执行。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-86197
Vulnerability Information
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Vulnerability Title
Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-86197
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-86197 (2)
Same Patch Batch · getgrav · 2026-09-05 · 5 CVEs total
| CVE-2026-86196 | 8.7 HIGH | Grav API Plugin before 1.0.20 Authentication Bypass via Host Header |
| CVE-2026-86195 | 8.7 HIGH | grav-plugin-api 1.0.0 through 1.0.19 Privilege Escalation via Dot-Keyed Super Flag |
| CVE-2026-86193 | 8.7 HIGH | Grav API Plugin Authentication Bypass via Group-Inherited Super |
| CVE-2026-86194 | 6.9 MEDIUM | Grav Form Plugin before 9.1.22 Cross-Page Form Execution |
IV. Related Vulnerabilities
Same product: grav
-
CVE-2026-85603
Grav Admin Plugin Path Traversal via Save As Language Code -
CVE-2026-85604
Grav before 2.0.18 Remote Code Execution via sort filter -
CVE-2026-85601
Grav Admin before 2.0.20 Cross-Site Scripting via marked.js -
CVE-2026-85598
Grav 2.0.0 through 2.0.17 Stored XSS via Modular Pages -
CVE-2026-80204
Grav before 1.0.18 Authentication Bypass via Scoped API Key
Same vendor: getgrav
-
CVE-2026-86196
Grav API Plugin before 1.0.20 Authentication Bypass via Host -
CVE-2026-86195
grav-plugin-api 1.0.0 through 1.0.19 Privilege Escalation vi -
CVE-2026-86194
Grav Form Plugin before 9.1.22 Cross-Page Form Execution -
CVE-2026-86193
Grav API Plugin Authentication Bypass via Group-Inherited Su -
CVE-2026-85603
Grav Admin Plugin Path Traversal via Save As Language Code
Same weakness: CWE-79
-
CVE-2026-86188
AVideo YPTSocket Plugin Unauthenticated Cross-Site Scripting -
CVE-2026-76573
Pods <= 3.3.9.1 - Authenticated (Contributor+) Stored Cross- -
CVE-2026-83625
Contact Form by Supsystic <= 1.10.2 - Unauthenticated Stored -
CVE-2026-85414
Gallery : FooGallery <= 3.3.2 - Authenticated (Contributor+) -
CVE-2026-75586
Unlimited Elements For Elementor <= 2.0.17 - Reflected Cross
V. Comments for CVE-2026-86197
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