Authorization bypass via late controller substitution
Published Aug 31, 2026 · Updated Sep 3, 2026
Authorization bypass in EasyCorp EasyAdminBundle 4.0.0 through 4.29.15 and 5.0.0 through 5.5.0 allows remote authenticated users to execute routes. AdminRouterSubscriber accepts the routeName query parameter and swaps controllers on kernel.controller after the firewall has evaluated only the dashboard URL. A low-privilege backend account, one reachable EasyAdmin URL, and knowledge of a target route name are required; controller-level authorization remains effective.
Summary
What happened
Authorization bypass in EasyCorp EasyAdminBundle 4.0.0 through 4.29.15 and 5.0.0 through 5.5.0 allows remote authenticated users to execute routes. AdminRouterSubscriber accepts the routeName query parameter and swaps controllers on kernel.controller after the firewall has evaluated only the dashboard URL. A low-privilege backend account, one reachable EasyAdmin URL, and knowledge of a target route name are required; controller-level authorization remains effective.
The record
- CVE
- CVE-2026-81892
- Published
- Aug 31, 2026
- Updated
- Sep 3, 2026
- Vendor
- EasyCorp
- Product
- EasyAdminBundle
- Classifications
- CWE-863, CWE-639, CWE-862, T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 4.0.0, < 4.29.16
- Affected versionversion=>= 5.0.0, < 5.5.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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