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CVE-2026-76846— Grav before 2.0.16 Information Disclosure via Twig Sandbox

Quick assessment

Affected
getgrav grav
Exploitation
Public or AI PoC available; prioritize validation
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 2.0.16之前版本存在信任管理问题漏洞，该漏洞源于Twig沙盒配置中的默认拒绝列表不完整，未阻止访问系统配置机密，攻击者可利用页面编辑权限在Twig模板中使用config.get()或config.toArray()检索敏感值。

CVSS 7.5 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 2.0.16 affected
2.0.16 unaffected
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I. Basic Information for CVE-2026-76846

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Grav before 2.0.16 Information Disclosure via Twig Sandbox
Source: CVE Program / CVE List V5
Vulnerability Description
Grav before 2.0.16 contains an incomplete default denylist in the Twig sandbox configuration that fails to block access to system configuration secrets. Attackers with page-edit permission can use config.get() or config.toArray() in Twig templates to retrieve sensitive values like system.cache.redis.password when config_access is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 信任管理问题漏洞
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 2.0.16之前版本存在信任管理问题漏洞，该漏洞源于Twig沙盒配置中的默认拒绝列表不完整，未阻止访问系统配置机密，攻击者可利用页面编辑权限在Twig模板中使用config.get()或config.toArray()检索敏感值。
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 ~ 2.0.16 -

II. Public POCs for CVE-2026-76846

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: secret exfiltrated via Twig -- rendered page leaked config system.cache.redis.password = PROOF_add2bca7f7e24517
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
Upgrade to Pro+
claude_code · 7157 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-76846

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Vendor Advisories for CVE-2026-76846 (2)

Same Patch Batch · getgrav · 2026-08-25 · 15 CVEs total

CVE-2026-56710 9.8 CRITICAL Grav Login Plugin before 1.0.16 Privilege Escalation via Unlock
CVE-2026-75574 8.8 HIGH Grav before 4.2.2 Remote Code Execution via Email Twig
CVE-2026-72696 8.4 HIGH Grav CMS before 2.0.16 Symlink Following via createLockFile
CVE-2026-72695 8.1 HIGH Grav before 2.0.16 Path Traversal via MediaUploadTrait deleteFile
CVE-2026-56707 7.7 HIGH Grav Flex Objects 1.4.0 through 1.4.7 Authorization Bypass via Shortcode
CVE-2026-72700 7.5 HIGH Grav before 3.9.1 Timing Attack via Non-Constant-Time Token Comparison
CVE-2026-56709 7.5 HIGH Grav before 3.9.2 Host Header Injection via sendInvitationEmail
CVE-2026-72698 6.5 MEDIUM Grav CMS before 2.0.16 Information Disclosure via Twig Sandbox Bypass
CVE-2026-72697 6.5 MEDIUM Grav CMS before 2.0.16 Path Traversal via media_directory
CVE-2026-76839 6.5 MEDIUM Grav before 2.0.16 Information Disclosure via offsetGet
CVE-2026-72702 5.4 MEDIUM Grav CMS before 2.0.16 Origin Validation Bypass via Referer
CVE-2026-72699 5.3 MEDIUM Grav Login Plugin before 3.9.1 Email Enumeration via Registration
CVE-2026-56708 5.3 MEDIUM Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
CVE-2026-72701 3.7 LOW Grav CMS before 2.0.16 Timing Attack via verifyNonce

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-522

V. Comments for CVE-2026-76846

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