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CVE-2026-72699— Grav Login Plugin before 3.9.1 Email Enumeration via Registration

Quick assessment

Affected
getgrav grav-plugin-login
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 3.9.1之前版本存在侧信道信息泄露漏洞，该漏洞源于register()方法在提交的电子邮件地址已属于现有账户时抛出不同异常（EMAIL_NOT_AVAILABLE），且注册端点无速率限制，可能导致攻击者逐个请求枚举网站上已注册的电子邮件地址。

CVSS 5.3 · Medium EPSS 0.34% · P26

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav-plugin-login < 3.9.1 affected
3.9.1 unaffected
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I. Basic Information for CVE-2026-72699

Vulnerability Information
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Vulnerability Title
Grav Login Plugin before 3.9.1 Email Enumeration via Registration
Source: CVE Program / CVE List V5
Vulnerability Description
The Grav Login plugin (getgrav/grav-plugin-login) before 3.9.1 is vulnerable to email address enumeration. The register() method in classes/Login.php throws a distinct exception (EMAIL_NOT_AVAILABLE) when a submitted email address already belongs to an existing account, while allowing registration to proceed otherwise. Because the registration endpoint has no rate limiting, an attacker can enumerate which email addresses have accounts on the site, one guess per request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 侧信道信息泄露漏洞
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 3.9.1之前版本存在侧信道信息泄露漏洞，该漏洞源于register()方法在提交的电子邮件地址已属于现有账户时抛出不同异常（EMAIL_NOT_AVAILABLE），且注册端点无速率限制，可能导致攻击者逐个请求枚举网站上已注册的电子邮件地址。
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-plugin-login 0 ~ 3.9.1 -

II. Public POCs for CVE-2026-72699

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III. Intelligence Information for CVE-2026-72699

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Vendor Advisories for CVE-2026-72699 (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-2026-76846 7.5 HIGH Grav before 2.0.16 Information Disclosure via Twig Sandbox
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-2026-56708 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-plugin-login
Same vendor: getgrav
Same weakness: CWE-203

V. Comments for CVE-2026-72699

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