medium6.5
CVE-2026-61690
Grav: Decompression Bomb via ZipArchiver - Missing Extraction Limits
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | getgrav/grav | < 2.0.1 | 2.0.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-928x-9mpw-8h56
- https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
- https://nvd.nist.gov/vuln/detail/CVE-2026-61690
- https://github.com/getgrav/grav/commit/1c1003cfcab5344203d6fde1aaa1f9a4ee3413ff
- https://github.com/getgrav/grav/releases/tag/2.0.1