CVE-2026-48557

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-184

Published

2026-05-29

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

• https://github.com/spatie/laravel-medialibrary/commit/608ea03703d3887c46434f5dda6af56de6346aba
• https://github.com/spatie/laravel-medialibrary/pull/3939
• https://github.com/spatie/laravel-medialibrary/releases/tag/11.23.0
• https://www.vulncheck.com/advisories/spatie-laravel-media-library-file-upload-restriction-bypass-via-fileadder-php

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