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CVE-2026-62386— Grav < 1.0.0-rc.16 Authentication Bypass via token URL Parameter

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.

getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 1.0.0-rc.16之前版本存在信息泄露漏洞，该漏洞源于通过URL查询参数接受JWT访问令牌，导致令牌嵌入URL后被记录在服务器访问日志、通过Referer标头泄露、存储在浏览器历史记录中，并被上游代理和CDN日志捕获，造成信息泄露，泄露的令牌可导致未经授权访问API，包括读取配置和用户数据、创建管理员账户、修改系统设置和删除页面。

CVSS 7.5 · High EPSS 0.27% · P19

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 1.0.0-rc.16 affected
1.0.0-rc.16 unaffected
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I. Basic Information for CVE-2026-62386

Vulnerability Information
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Vulnerability Title
Grav < 1.0.0-rc.16 Authentication Bypass via token URL Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 accepts JWT access tokens through the ?token= URL query parameter on every API route (JwtAuthenticator::extractBearerToken fallback). Because tokens are embedded in URLs, they are logged verbatim in web server access logs, leaked via the Referer header, stored in browser history, and captured by upstream proxy and CDN logs, exposing valid admin access tokens. A leaked token grants unauthorized API access, including reading configuration and user data, creating admin accounts, modifying system settings, and deleting pages.
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
通过GET请求中的查询字符串导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
getgrav Grav 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
getgrav Grav是getgrav个人开发者开源的一套可扩展的内容管理系统。 getgrav Grav 1.0.0-rc.16之前版本存在信息泄露漏洞，该漏洞源于通过URL查询参数接受JWT访问令牌，导致令牌嵌入URL后被记录在服务器访问日志、通过Referer标头泄露、存储在浏览器历史记录中，并被上游代理和CDN日志捕获，造成信息泄露，泄露的令牌可导致未经授权访问API，包括读取配置和用户数据、创建管理员账户、修改系统设置和删除页面。
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 ~ 1.0.0-rc.16 -

II. Public POCs for CVE-2026-62386

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6483 chars
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III. Intelligence Information for CVE-2026-62386

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Vendor Advisories for CVE-2026-62386 (2)

Same Patch Batch · getgrav · 2026-07-17 · 10 CVEs total

CVE-2026-62233 8.8 HIGH grav-plugin-api < 1.0.6 Privilege Escalation via createApiKey
CVE-2026-62234 8.1 HIGH Grav < 2.0.4 SSRF via Unrestricted cURL Protocols
CVE-2026-62231 8.1 HIGH Grav < 1.0.6 API Key Scope Bypass via ApiKeyAuthenticator
CVE-2026-62230 7.5 HIGH Grav < 2.0.4 File Access Bypass via Case Variation
CVE-2026-62232 7.4 HIGH Grav < 2.0.4 2FA Bypass via Secret Regeneration
CVE-2026-62387 7.1 HIGH Grav < 1.0.0-rc.16 CORS Misconfiguration via API Plugin
CVE-2026-62237 6.5 MEDIUM Grav < 2.0.4 ReDoS via regex_replace in Sandbox
CVE-2026-62235 6.3 MEDIUM Grav Flex-Objects < 1.4.3 Authorization Bypass via API
CVE-2026-62236 5.4 MEDIUM grav-plugin-login < 3.8.11 CSRF via regenerate2FASecret

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-598

V. Comments for CVE-2026-62386

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