CVE-2026-61455 getgrav CVE debrief

Who should care

Administrators and users of Grav versions prior to 2.0.1 should be aware of this vulnerability and take immediate action to mitigate the risk. This includes operators managing Grav installations, platform administrators responsible for system security, vulnerability management teams assessing exposure, and security teams verifying mitigations.

Technical summary

The vulnerability is caused by the lack of limits on uncompressed size, file count, and nesting depth in the ZipArchiver::extract() function in Grav versions prior to 2.0.1. This allows attackers to supply a crafted ZIP archive that can cause a denial of service by exhausting storage resources, impacting system availability and security integrity. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity, emphasizing the need for prompt action to mitigate risks effectively.

Defensive priority

Highly Critical - Immediate Action Required to prevent potential Denial of Service attacks by exhausting storage resources through crafted ZIP archives in Grav versions prior to 2.0.1. Implement immediate mitigations and verify affected deployments to minimize potential impact and ensure system availability and security integrity. Consider implementing additional security controls such as Web Application Firewalls (WAFs) to detect and prevent potential attacks. Monitor system resources for unusual activity and review compensating controls for exposed systems while remediation is scheduled and verified. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Ensure that security teams and operators are aware of the vulnerability and take necessary actions to protect against potential attacks. This vulnerability has a CVSS score of 7.1 and is classified as HIGH severity, emphasizing the need for prompt action to mitigate risks effectively. The vulnerability exists in the ZipArchiver::extract() function, which lacks limits on uncompressed size, file count, and nesting depth, allowing attackers to cause a denial of service by exhausting storage resources. Administrators and users of Grav versions prior to 2.0.1 should be aware of this vulnerability and take immediate action to mitigate the risk. Update Grav to version 2.0.1 or later to address the vulnerability. Implement input validation and sanitization for ZIP archives to prevent potential attacks. Consider implementing additional security controls such as Web Application Firewalls (WAFs) to detect and prevent potential attacks. Monitor system resources for unusual activity and review compensating controls for exposed systems while remediation is scheduled and ver

Recommended defensive actions

• Update Grav to version 2.0.1 or later
• Implement input validation and sanitization for ZIP archives
• Monitor system resources for unusual activity
• Consider implementing additional security controls such as Web Application Firewalls (WAFs)
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The vulnerability was reported by Vulncheck and is publicly disclosed with evidence limits. The CVE record was published on 2026-07-10T15:16:50.877Z and last modified on 2026-07-10T17:41:47.303Z. The NVD entry is currently Deferred. Defenders should verify the affected scope and vendor guidance.

Official resources