CVE-2026-48557 Spatie Laravel Media Library < 11.23.0 File Upload Restriction Bypass via FileAdder.php
Attackers can bypass file upload restrictions to upload malicious files, potentially achieving code execution if server configurations allow it.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48557?
CVE-2026-48557 is a high-severity vulnerability in spatie laravel-medialibrary, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Spatie Laravel Media Library before version 11.23.0 contains a file upload restriction bypass in FileAdder::defaultSanitizer(). The sanitizer checks only the final filename suffix, allowing double-extension filenames such as shell.php.jpg to bypass the blocklist, with pathinfo() preserving inner .php stems in saved filenames. The blocklist also omits executable extensions including .php6, .shtml, and .htaccess. The double-extension bypass requires a legacy Apache AddHandler configuration to achieve PHP execution; the incomplete blocklist bypass does not.
Weakness: CWE-184
Which versions are affected by CVE-2026-48557?
2 open source packages ship an affected version, including spatie/laravel-medialibrary.
| Package | Affected | Fixed in |
|---|---|---|
spatie/laravel-medialibrary Packagist | All versions | 11.23.0 |
spatie/laravel-medialibrary Packagist | All versions | 11.23.0 |
How do I fix CVE-2026-48557?
Upgrade spatie/laravel-medialibrary to 11.23.0 or later.
Is CVE-2026-48557 being exploited?
There is no known exploitation of CVE-2026-48557 in the wild and no public exploit code.
Sources
Also known as GHSA-3ggm-c5m7-hfv5.