CVE-2026-48557 — Vulnerability in spatie/laravel-medialibrary —...

HIGH

Spatie Laravel Media Library contains a file upload restriction bypass

Published May 29, 2026Updated September 10, 2026Source: osv

Summary

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.

Advisory Timeline

First published May 29, 2026 (136 days ago).
Last revised September 10, 2026 — 103 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer

Update spatie/laravel-medialibrary to 11.23.0 or later

composer require "spatie/laravel-medialibrary:^11.23.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: packagist (1).

Package	Ecosystem	Affected	Fixed In
spatie/laravel-medialibrary	packagist	0.1.0, 1.0.0, 1.1.0, 1.1.1 (+507 more)	11.23.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-184
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

References

Frequently Asked Questions

What is CVE-2026-48557?: Spatie Laravel Media Library contains a file upload restriction bypass This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2026-48557?: CVE-2026-48557 affects spatie/laravel-medialibrary. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-48557 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-3ggm-c5m7-hfv5

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