Vulnerability in Spatie Laravel-Medialibrary
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (38.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.004 · change: -0.003
Affected products
- Spatie Laravel-Medialibrary — versions 0
Weakness classification (CWE)
References
- github.com/spatie/laravel-medialibrary/commit/608ea03703d3887c46434f5dda6af56de… (patch)
- github.com/spatie/laravel-medialibrary/pull/3939 (issue-tracking)
- github.com/spatie/laravel-medialibrary/releases/tag/11.23.0 (release-notes)
- www.vulncheck.com/advisories/spatie-laravel-media-library-file-upload-restricti… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-48557?
- CVE-2026-48557 is a high-severity vulnerability in Spatie Laravel-Medialibrary, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2026-05-29.
- How severe is CVE-2026-48557?
- High severity. CVSS v3 base score is 8.8 out of 10.