Summary
EasyAdmin custom-action dispatcher bypasses access_control on other routes
EasyAdmin serves all backend requests through a single dashboard route and, for custom actions (Action::linkToRoute() / MenuItem::linkToRoute()), swaps the executed controller based on the routeName query parameter on the kernel.controller event.
That 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 could reach a more restricted route by name.
Workarounds
Add controller-level authorization (#[IsGranted] / denyAccessUnlessGranted()) to any sensitive route, since controller-level checks are still enforced. Upgrading is the recommended fix.
Credits
Reported by @TungNGo02.
Impact
Any application where access_control (or another path-based Symfony security rule) protects some routes more strictly than the dashboard URL used to reach EasyAdmin. An attacker 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] / denyAccessUnlessGranted() remain protected, because those checks are recomputed against the swapped-in controller.
The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.
CVE-2026-81892 has a CVSS score of 8.1 (High). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.29.16, 5.5.1); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Fixed in 4.29.16 and 5.5.1. Before dispatching a custom-action route, EasyAdmin now re-evaluates the target route's access_control rule and denies the request if the current user is not granted access.
Frequently Asked Questions
- What is CVE-2026-81892? CVE-2026-81892 is a high-severity missing authorization vulnerability in easycorp/easyadmin-bundle (composer), affecting versions >= 4.0.0, < 4.29.16. It is fixed in 4.29.16, 5.5.1. The application does not perform an authorization check before performing a sensitive operation.
- How severe is CVE-2026-81892? CVE-2026-81892 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of easycorp/easyadmin-bundle are affected by CVE-2026-81892? easycorp/easyadmin-bundle (composer) versions >= 4.0.0, < 4.29.16 is affected.
- Is there a fix for CVE-2026-81892? Yes. CVE-2026-81892 is fixed in 4.29.16, 5.5.1. Upgrade to this version or later.
- Is CVE-2026-81892 exploitable, and should I be worried? Whether CVE-2026-81892 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-81892 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-81892?
- Upgrade
easycorp/easyadmin-bundleto 4.29.16 or later - Upgrade
easycorp/easyadmin-bundleto 5.5.1 or later
- Upgrade