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Fencer Vulns
medium 6.5

GHSA-mhf7-xp6r-6qrc json

Livewire: Authorization bypass in #[Authorize] via reordered parameter keys and #[Json] execution order

published 2026-10-23 16 d ago modified 2026-10-23 16 d ago

cvss
6.5
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Impact

Three issues allowed actions protected by the `#[Authorize]` attribute to run against records the current user is not authorized for:

1. **Out-of-order parameter keys on actions.** `#[Authorize]` resolved a model parameter by its array key, while the action itself received parameters positionally. A request sending params as an object with reordered integer keys (e.g. `{"1": 2, "0": 1}`) could pass authorization with a record the user owns while the action received a different record. With `#[Authorize('delete', 'comment')]` on `deleteComment(Comment $comment)`, a user could delete another user's comment. 2. **The same issue on event listeners.** Methods using both `#[On]` and `#[Authorize]` with a model parameter were affected in the same way through the `__dispatch` call. 3. **`#[Json]` methods ran before authorization.** When a method had both `#[Json]` and `#[Authorize]`, the method body executed before the authorization check. The response was still a 403, but any side effects (such as database writes) had already happened.

Only applications using the `#[Authorize]` attribute are affected: on methods that take model parameters (issues 1 and 2), or on `#[Json]` methods (issue 3). Authorization performed inside the method (e.g. `$this->authorize(...)`) is not affected. Livewire 3.x is not affected.

### Patches

Fixed in **v4.4.8**. Call and event parameters must now be a list or use named (string) keys, otherwise the request is rejected, and `#[Json]` methods are authorized before they run.

### Workarounds

Upgrade to v4.4.8. If you can't upgrade right away, call `$this->authorize(...)` inside affected methods instead of relying on the `#[Authorize]` attribute.

### Credits

Reported by Yousef Aman ([@yousef-aman](https://github.com/yousef-aman)).

Patch / fix

  • packagist livewire/livewire 4.4.8

CVSS scores

assigned by version score vector
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
packagist livewire/livewire
>=4.3.0, <4.4.8
4.4.8

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.