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CVE-2026-85604— Grav before 2.0.18 Remote Code Execution via sort filter

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是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 2.0.18之前版本存在代码注入漏洞，该漏洞源于Twig sort过滤器中的sortFunc包装器将Twig的isSandboxed参数硬编码为false，且黑名单未包含spl_autoload，导致仅具备页面写入权限的已认证用户可通过特制载荷调用spl_autoload，进而以Web服务器用户身份执行任意PHP代码。

CVSS 8.8 · High EPSS 0.86% · P58

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.18 affected
2.0.18 unaffected
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I. Basic Information for CVE-2026-85604

Vulnerability Information
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Vulnerability Title
Grav before 2.0.18 Remote Code Execution via sort filter
Source: CVE Program / CVE List V5
Vulnerability Description
Grav before 2.0.18 (affected versions <= 2.0.17) contains a remote code execution vulnerability in the Twig sort filter. The sortFunc wrapper in GravExtension.php hardcodes Twig's isSandboxed argument to false, so unlike |map/|filter/|reduce, |sort accepts a plain function name inside the sandbox; the remaining denylist misses spl_autoload, which performs a PHP include. An authenticated user with only page-write rights (admin.pages or api.pages.write) can supply a crafted payload (e.g., via form frontmatter rendered by the Email plugin) that invokes spl_autoload through the sort filter, resulting in arbitrary PHP execution as the web server user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是Grav组织开源的一款基于文件的扁平化内容管理系统。 Grav 2.0.18之前版本存在代码注入漏洞，该漏洞源于Twig sort过滤器中的sortFunc包装器将Twig的isSandboxed参数硬编码为false，且黑名单未包含spl_autoload，导致仅具备页面写入权限的已认证用户可通过特制载荷调用spl_autoload，进而以Web服务器用户身份执行任意PHP代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 2.0.18 -

II. Public POCs for CVE-2026-85604

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III. Intelligence Information for CVE-2026-85604

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Vendor Advisories for CVE-2026-85604 (2)

Same Patch Batch · getgrav · 2026-09-04 · 7 CVEs total

CVE-2026-85599 7.2 HIGH Grav Shortcode Core before 6.2.5 Stored XSS via unescaped parameters
CVE-2026-85603 6.5 MEDIUM Grav Admin Plugin Path Traversal via Save As Language Code
CVE-2026-85598 6.4 MEDIUM Grav 2.0.0 through 2.0.17 Stored XSS via Modular Pages
CVE-2026-85600 5.4 MEDIUM Grav Admin before 2.0.21 Stored XSS via username
CVE-2026-85601 5.4 MEDIUM Grav Admin before 2.0.20 Cross-Site Scripting via marked.js
CVE-2026-85602 5.3 MEDIUM Grav Form Plugin before 9.1.20 reCAPTCHA v3 Authentication Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-94

V. Comments for CVE-2026-85604

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