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.
EPSS: 0.004 (37.5th percentile) — read the EPSS interpretation.
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.
Affected products
- Spatie Laravel-medialibrary — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (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.