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CVE-2026-81892: CWE-639: Authorization Bypass Through User-Controlled Key in EasyCorp EasyAdminBundle

0
High
VulnerabilityCVE-2026-81892cvecve-2026-81892cwe-639cwe-862cwe-863
Published: 08/31/2026 (08/31/2026, 20:38:06 UTC)
Source: CVE Database V5
Vendor/Project: EasyCorp
Product: EasyAdminBundle

Description

EasyAdmin is a fast and modern admin generator for Symfony applications. From 4.0.0 until 4.29.16 and 5.5.1, EasyAdmin serves all backend requests through a single dashboard route and, for custom actions (Action::linkToRoute() and MenuItem::linkToRoute()), swaps the executed controller based on the routeName query parameter on the kernel.controller event. The swap happens after Symfony's security firewall has already evaluated access_control against the original dashboard URL, and the routeName value was not validated. As a result, a path-based access_control rule protecting the target route was never evaluated, so a low-privilege backend user who can reach a single EasyAdmin URL and knows a target route's name can execute that route's controller, bypassing the path-based rule. Only path-based protections are bypassed. Routes whose controller enforces its own authorization with #[IsGranted] or denyAccessUnlessGranted() remain protected because those checks are recomputed against the swapped-in controller. This issue is fixed in versions 4.29.16 and 5.5.1.

CVSS v3.1

Score 8.1high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-08-27T17:48:42.123Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a95e9b0acd9273b49934efb

Added to database: 08/31/2026, 20:53:04 UTC

Last updated: 09/01/2026, 03:37:49 UTC

Views: 7

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