CVE-2026-61690: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in getgrav grav
CVE-2026-61690 is a vulnerability in the Grav file-based web platform prior to version 2.0.1. The issue arises from improper handling of highly compressed ZIP archives in the ZipArchiver::extract() function, which does not enforce limits on uncompressed size, file count, or nesting depth. This can lead to resource exhaustion such as disk space or inode depletion, causing site unavailability. The vulnerability is fixed in Grav version 2.0.1.
AI Analysis
Technical Summary
Grav versions before 2.0.1 contain a vulnerability (CWE-409) in the ZipArchiver::extract() method where archives are passed to ZipArchive::extractTo() without enforcing configured limits on uncompressed size, file count, or nesting depth. An attacker can exploit this by providing a crafted ZIP archive that decompresses to a large amount of data, exhausting disk space or inodes and causing denial of service. The issue is resolved in version 2.0.1.
Potential Impact
An attacker able to supply a malicious ZIP archive to the Grav platform can cause denial of service by exhausting disk space or inode resources on the server, leading to site unavailability. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade Grav to version 2.0.1 or later where this vulnerability is fixed. Prior to upgrading, limit the acceptance of untrusted ZIP archives or implement external controls to restrict archive size and complexity. No other vendor advisory content is provided.
CVE-2026-61690: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) in getgrav grav
Description
CVE-2026-61690 is a vulnerability in the Grav file-based web platform prior to version 2.0.1. The issue arises from improper handling of highly compressed ZIP archives in the ZipArchiver::extract() function, which does not enforce limits on uncompressed size, file count, or nesting depth. This can lead to resource exhaustion such as disk space or inode depletion, causing site unavailability. The vulnerability is fixed in Grav version 2.0.1.
CVSS v3.1
Score 6.5medium
Affected software
getgrav
grav
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Grav versions before 2.0.1 contain a vulnerability (CWE-409) in the ZipArchiver::extract() method where archives are passed to ZipArchive::extractTo() without enforcing configured limits on uncompressed size, file count, or nesting depth. An attacker can exploit this by providing a crafted ZIP archive that decompresses to a large amount of data, exhausting disk space or inodes and causing denial of service. The issue is resolved in version 2.0.1.
Potential Impact
An attacker able to supply a malicious ZIP archive to the Grav platform can cause denial of service by exhausting disk space or inode resources on the server, leading to site unavailability. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade Grav to version 2.0.1 or later where this vulnerability is fixed. Prior to upgrading, limit the acceptance of untrusted ZIP archives or implement external controls to restrict archive size and complexity. No other vendor advisory content is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-10T18:36:58.850Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a85cdc8acd9273b4944357a
Added to database: 08/19/2026, 15:37:44 UTC
Last enriched: 09/11/2026, 08:04:43 UTC
Last updated: 10/02/2026, 04:53:45 UTC
Views: 66
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