CVE-2026-62670Network attack vector

Privilege escalation via fail-open API authorization

Published Aug 19, 2026 · Updated Aug 19, 2026

Authorization bypass in Grav Flex Objects Plugin before 1.4.3 allows remote authenticated users to read and modify objects via the admin-next API. In classes/Api/FlexApiController.php, requireFlexPermission() returns after checking only api.access when a directory blueprint omits config.admin.permissions, instead of falling back to Grav core's default-deny admin.flex-object. authorization path. Exposure requires the API plugin and a flex directory without an explicit permissions block; an account with access.api.access but no directory permission can still reach index, show, create, update, delete, export, and media handlers for that directory.

CVSS severity6.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in Grav Flex Objects Plugin before 1.4.3 allows remote authenticated users to read and modify objects via the admin-next API. In classes/Api/FlexApiController.php, requireFlexPermission() returns after checking only api.access when a directory blueprint omits config.admin.permissions, instead of falling back to Grav core's default-deny admin.flex-object. authorization path. Exposure requires the API plugin and a flex directory without an explicit permissions block; an account with access.api.access but no directory permission can still reach index, show, create, update, delete, export, and media handlers for that directory.

The record

CVE
CVE-2026-62670
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Grav
Product
Grav Flex Objects Plugin
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grav · Grav Flex Objects Pluginversion=< 1.4.3

Published CVSS scores

6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo