vulnerability / NVI-00004095 / Revision 2
Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes
OSV carries this publisher advisory for symfony/security-http, symfony/symfony, symfony/security-http, symfony/security-http, symfony/security-http. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.5 HIGH (3.1)
nvd@nist.gov severity; no combined Null risk score.
8.7 HIGH (4.0)
security-advisories@github.com severity; no combined Null risk score.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
symfony/security-http
source listedECOSYSTEM: introduced 0; fixed 5.4.53
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/symfony
source listedECOSYSTEM: introduced 0; fixed 5.4.53
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/security-http
source listedECOSYSTEM: introduced 6.0.0; fixed 6.4.41
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/security-http
source listedECOSYSTEM: introduced 7.0.0; fixed 7.4.13
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/security-http
source listedECOSYSTEM: introduced 8.0.0; fixed 8.0.13
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/symfony
source listedECOSYSTEM: introduced 6.0.0; fixed 6.4.41
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/symfony
source listedECOSYSTEM: introduced 7.0.0; fixed 7.4.13
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
symfony/symfony
source listedECOSYSTEM: introduced 8.0.0; fixed 8.0.13
### Description When a firewall is configured with `form-login` (or any authenticator using `DefaultAuthenticationFailureHandler`) and the `failure_forward: true` option, the handler reads the `_failure_path` parameter from the failing login request and uses it as the path of an internal subrequest dispatched through `HttpKernelInterface::SUB_REQUEST`. Symfony's `Firewall::onKernelRequest` listener intentionally skips subrequests under the assumption they are internally generated and trusted, which also means `AccessListener` (the listener that evaluates `access_control`) does not run. Because the attacker controls the target of the subrequest, an unauthenticated POST to the check path with `_failure_path=/admin/whatever` performs a local request forgery that executes the target controller outside the firewall perimeter and returns its response to the caller. Applications that follow Symfony's recommended best practice of protecting administrative areas with broad `access_control` rules (e.g. `^/admin` requires `ROLE_ADMIN`) and expose read-only GET endpoints under that area (data exports, internal APIs, account views) are fully exposed: any such GET route can be read by an unau
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 5.4.53 for symfony/security-http. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 5.4.53 for symfony/symfony. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 6.4.41 for symfony/security-http. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 7.4.13 for symfony/security-http. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 8.0.13 for symfony/security-http. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 6.4.41 for symfony/symfony. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 7.4.13 for symfony/symfony. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 8.0.13 for symfony/symfony. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. NIST National Vulnerability Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-6h46-9jf5-q59x ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-48489 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.