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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-plugin-api 在 1.0.20 之前的版本中存在一个权限提升漏洞，位于 InvitationsController 中。该漏洞源于 stripSuperFlags() 方法仅能移除嵌套的 super 标志，却未能移除以点号作为键的等价标志（如 api.super）。因此，拥有 api.access 和 api.users.write 权限的非超级用户管理员可以创建一个包含点号键超级标志（如 api.super）的邀请请求，从而绕过检查机制，并将该标志持久化到新创建的账户中。攻击者随后可以通过公共端

CVSS 8.7 · High

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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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

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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