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CVE-2026-86195— grav-plugin-api 1.0.0 through 1.0.19 Privilege Escalation via Dot-Keyed Super Flag

Quick assessment

Affected
getgrav grav-plugin-api
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 1.0.20之前版本存在权限许可和访问控制问题漏洞，该漏洞源于InvitationsController中的stripSuperFlags()方法仅移除嵌套super标志，未能剥离api.super等点键等价标志，具有api.access和api.users.write权限的非超级用户管理器可创建绕过防护的邀请，攻击者通过公共端点接受邀请后即可创建超级管理员账户并获得有效JWT，导致权限提升。

CVSS 8.7 · High EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav-plugin-api < 1.0.20 affected
1.0.20 unaffected
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I. Basic Information for CVE-2026-86195

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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-plugin-api 1.0.0 through 1.0.19 Privilege Escalation via Dot-Keyed Super Flag
Source: CVE Program / CVE List V5
Vulnerability Description
grav-plugin-api versions before 1.0.20 contain a privilege escalation vulnerability in the InvitationsController where the stripSuperFlags() method only removes nested super flags but fails to strip dot-keyed equivalents like api.super. A non-super user manager with api.access and api.users.write permissions can create an invitation with a dot-keyed super flag in the access payload that bypasses the guard and persists to the new account. Attackers can accept the invitation through the public endpoint without real invitee interaction to create a super-admin account and immediately receive a valid JWT for full site control.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 权限许可和访问控制问题漏洞
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 1.0.20之前版本存在权限许可和访问控制问题漏洞，该漏洞源于InvitationsController中的stripSuperFlags()方法仅移除嵌套super标志，未能剥离api.super等点键等价标志，具有api.access和api.users.write权限的非超级用户管理器可创建绕过防护的邀请，攻击者通过公共端点接受邀请后即可创建超级管理员账户并获得有效JWT，导致权限提升。
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-api 0 ~ 1.0.20 -

II. Public POCs for CVE-2026-86195

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III. Intelligence Information for CVE-2026-86195

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Vendor Advisories for CVE-2026-86195 (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-2026-86193 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
CVE-2026-86197 5.1 MEDIUM Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox

IV. Related Vulnerabilities

Same product: grav-plugin-api
Same vendor: getgrav
Same weakness: CWE-269

V. Comments for CVE-2026-86195

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