CVE-2026-53933 Maravel-Framework Vulnerable to Side-Channel Information Disclosure (Error Oracle) via Dynamic Route Fuzzing
Attackers can map internal route parameters and controller schemas by triggering distinct 500 errors via dynamic route fuzzing in the Maravel PHP framework.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53933?
CVE-2026-53933 is a medium-severity vulnerability in macropay-solutions maravel-framework, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Maravel, a PHP framework oriented towards dependency injection, prior to version 10.73.1 has a side-channel information disclosure issue. When a route was compiled with dynamic placeholders (e.g., `/api/v1/users/{id}`), the raw string placeholder key was mistakenly registered into the flat static route checklist. An attacker scanning endpoints could intentionally pass the literal template syntax (e.g., `GET /api/v1/users/{id}`) to force an unexpected match against the static map. Because the dynamic tree engine was bypassed, no arguments were captured. This forced modern PHP 8+ versions to throw a native `ArgumentCountError`, resulting in a 500 Internal Server Error instead of a uniform 404 Not Found. By tracking which fuzz patterns exploded into a 500 error, a malicious actor could programmatically profile and map out internal route parameter names and controller schemas. Version 10.73.1 contains a patch. As a workaround, mitigate this side-channel leak by implementing a defensive check in a global middleware. This will reject any literal brace patterns before they reach the router engine.
Weakness: CWE-203
Which versions are affected by CVE-2026-53933?
How do I fix CVE-2026-53933?
No fix has been published for CVE-2026-53933 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-53933 being exploited?
There is no known exploitation of CVE-2026-53933 in the wild and no public exploit code.