Vulnerability · Published Sep 1, 2026 · Assigned by GitHub_M
CVE-2026-84374Laravel Excel writes exports outside the configured filesystem disk when given a caller-controlled path
High 7.5
In plain English
A high-severity path traversal in Laravel-Excel from SpartnerNL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Laravel Excel provides supercharged Excel exports and imports in Laravel. From 3.1.8 until 3.1.70, in src/Files/Disk.php the Maatwebsite\Excel\Files\Disk::copy() method resolves the caller-controlled $destination supplied through Excel::store(), $export->store(), or storeExcel() against the process working directory with realpath() instead of the configured filesystem disk. If the path names an existing writable file, Disk::copy() opens it with fopen() in rb+ mode and uses stream_copy_to_stream(), bypassing Flysystem path confinement and allowing an attacker whose application input controls the export path to overwrite arbitrary existing files with export content. The rb+ behavior creates a non-truncating overwrite and trailing bytes when the new export is shorter, and overwriting an executable PHP file can lead to remote code execution. This issue is fixed in version 3.1.70.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | maatwebsite/excel | 3.1.70 | GHSA-c7r6-vx3h-w5g2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SpartnerNL | Laravel-Excel | >= 3.1.8, < 3.1.70 |
Weakness: CWE-22, CWE-73 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H