medium4.9
CVE-2026-59193
Grav CMS — Improper Handling of Highly Compressed Data in Installer::unZip()
Impact
Grav is a file-based Web platform. Prior to 2.0.0, an authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool because Installer::unZip calls ZipArchive::extractTo without limits on uncompressed size, entry count, or directory depth. This issue is fixed in version 2.0.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | getgrav/grav | >= 1.0.0, < 2.0.0 | 2.0.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Getgrav | Grav | from 1.0.0 before 2.0.0 Version 2.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-2vcx-h8p2-9pg9
- https://github.com/getgrav/grav/security/advisories/GHSA-2vcx-h8p2-9pg9
- https://nvd.nist.gov/vuln/detail/CVE-2026-59193
- https://github.com/getgrav/grav/commit/23d6f2adf4ce11889c088ac8557c8314baeef781
- https://github.com/getgrav/grav/releases/tag/2.0.0