fkie_cve-2026-61690

Grav is a file-based Web platform. Prior to 2.0.1, Grav ZipArchiver::extract() in system/src/Grav/Common/Filesystem/ZipArchiver.php passes archives to ZipArchive::extractTo() without enforcing the system.gpm.archive uncompressed-size, file-count, or nesting-depth limits. Code using Archiver::create('zip') to extract an attacker-controlled archive can exhaust disk space or inodes and make the site unavailable. This issue is fixed in version 2.0.1.

GHSA-928x-9mpw-8h56 — Grav: Decompression Bomb via ZipArchiver - Missing Extraction Limits

Affected: Packagist: getgrav/grav

## Summary `ZipArchiver::extract()` lacks limits on uncompressed size, file count, and nesting depth, creating a distinct, unpatched variant of the GHSA-2vcx-h8p2-9pg9 zip bomb vulnerability. While the parallel method Installer::unZip() received comprehensive limits, ZipArchiver::extract() remains unprotected, leaving a separate code path vulnerable to the same attack vector. The vulnerability is a distinct, unpatched variant of the bug described in GHSA-2vcx-h8p2-9pg9, as it affects a separate code path in the same codebase, implementing the same abstract class.

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## Details

**Vulnerable code** - `system/src/Grav/Common/Filesystem/ZipArchiver.php:29-58`:

```php public function extract($destination, ?callable $status = null) { $zip = new ZipArchive(); $archive = $zip->open($this->archive_file);

if ($archive === true) { Folder::create($destination);

// Only guards against Zip Slip (path traversal) for ($i = 0, $count = $zip->count(); $i < $count; $i++) { $name = $zip->getNameIndex($i); if ($name !== false && !$this->isSafeEntryPath($name)) { $zip->close(); throw new RuntimeException(...); } }

// Extracts EVERYTHING — no size, count, or depth limit if (!$zip->extractTo($destination)) { ... }

$zip->close(); return $this; } } ```

**What's missing vs `Installer::unZip()`**:

| Protection | `Installer::unZip()` | `ZipArchive…

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fkie_cve-2026-61690

GHSA-928x-9mpw-8h56 — Grav: Decompression Bomb via ZipArchiver - Missing Extraction Limits